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Fujima N, Nakagawa J, Ikebe Y, Kameda H, Harada T, Shimizu Y, Tsushima N, Kano S, Homma A, Kwon J, Yoneyama M, Kudo K. Improved image quality in contrast-enhanced 3D-T1 weighted sequence by compressed sensing-based deep-learning reconstruction for the evaluation of head and neck. Magn Reson Imaging 2024; 108:111-115. [PMID: 38340971 DOI: 10.1016/j.mri.2024.02.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 02/07/2024] [Accepted: 02/07/2024] [Indexed: 02/12/2024]
Abstract
PURPOSE To assess the utility of deep learning (DL)-based image reconstruction with the combination of compressed sensing (CS) denoising cycle by comparing images reconstructed by conventional CS-based method without DL in fat-suppressed (Fs)-contrast enhanced (CE) three-dimensional (3D) T1-weighted images (T1WIs) of the head and neck. MATERIALS AND METHODS We retrospectively analyzed the cases of 39 patients who had undergone head and neck Fs-CE 3D T1WI applying reconstructions based on conventional CS and CS augmented by DL, respectively. In the qualitative assessment, we evaluated overall image quality, visualization of anatomical structures, degree of artifacts, lesion conspicuity, and lesion edge sharpness based on a five-point system. In the quantitative assessment, we calculated the signal-to-noise ratios (SNRs) of the lesion and the posterior neck muscle and the contrast-to-noise ratio (CNR) between the lesion and the adjacent muscle. RESULTS For all items of the qualitative analysis, significantly higher scores were awarded to images with DL-based reconstruction (p < 0.001). In the quantitative analysis, DL-based reconstruction resulted in significantly higher values for both the SNR of lesions (p < 0.001) and posterior neck muscles (p < 0.001). Significantly higher CNRs were also observed in images with DL-based reconstruction (p < 0.001). CONCLUSION DL-based image reconstruction integrating into the CS-based denoising cycle offered superior image quality compared to the conventional CS method. This technique will be useful for the assessment of patients with head and neck disease.
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Affiliation(s)
- Noriyuki Fujima
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, N14 W5, Kita-Ku, Sapporo 0608638, Japan.
| | - Junichi Nakagawa
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, N14 W5, Kita-Ku, Sapporo 0608638, Japan
| | - Yohei Ikebe
- Department of Diagnostic Imaging, Graduate School of Medicine, Hokkaido University, N15 W7, Kita-Ku, Sapporo, Hokkaido 060-8638, Japan; Center for Cause of Death investigation, Faculty of Medicine, Hokkaido University, N15 W7, Kita-Ku, Sapporo, Hokkaido 060-8638, Japan
| | - Hiroyuki Kameda
- Faculty of Dental Medicine Department of Radiology Hokkaido University, N13 W7, Kita-ku, Sapporo, Hokkaido 060-8586, Japan
| | - Taisuke Harada
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, N14 W5, Kita-Ku, Sapporo 0608638, Japan
| | - Yukie Shimizu
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, N14 W5, Kita-Ku, Sapporo 0608638, Japan
| | - Nayuta Tsushima
- Department of Otolaryngology-Head and Neck Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, N15 W7, Kita ku, Sapporo 060-8638, Japan
| | - Satoshi Kano
- Department of Otolaryngology-Head and Neck Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, N15 W7, Kita ku, Sapporo 060-8638, Japan
| | - Akihiro Homma
- Department of Otolaryngology-Head and Neck Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, N15 W7, Kita ku, Sapporo 060-8638, Japan
| | - Jihun Kwon
- Philips Japan, 3-37 Kohnan 2-chome, Minato-ku, Tokyo 108-8507, Japan
| | - Masami Yoneyama
- Philips Japan, 3-37 Kohnan 2-chome, Minato-ku, Tokyo 108-8507, Japan
| | - Kohsuke Kudo
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, N14 W5, Kita-Ku, Sapporo 0608638, Japan; Department of Diagnostic Imaging, Graduate School of Medicine, Hokkaido University, N15 W7, Kita-Ku, Sapporo, Hokkaido 060-8638, Japan; Clinical AI Human Resources Development Program, Faculty of Medicine, Hokkaido University, N15 W7, Kita-Ku, Sapporo, Hokkaido 060-8638, Japan; Global Center for Biomedical Science and Engineering, Faculty of Medicine, Hokkaido University, N14 W5, Kita-Ku, Sapporo, Hokkaido 060-8638, Japan
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Lemainque T, Yoneyama M, Morsch C, Iordanishvili E, Barabasch A, Schulze-Hagen M, Peeters JM, Kuhl C, Zhang S. Reduction of ADC bias in diffusion MRI with deep learning-based acceleration: A phantom validation study at 3.0 T. Magn Reson Imaging 2024; 110:96-103. [PMID: 38631532 DOI: 10.1016/j.mri.2024.04.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 04/10/2024] [Accepted: 04/13/2024] [Indexed: 04/19/2024]
Abstract
PURPOSE Further acceleration of DWI in diagnostic radiology is desired but challenging mainly due to low SNR in high b-value images and associated bias in quantitative ADC values. Deep learning-based reconstruction and denoising may provide a solution to address this challenge. METHODS The effects of SNR reduction on ADC bias and variability were investigated using a commercial diffusion phantom and numerical simulations. In the phantom, performance of different reconstruction methods, including conventional parallel (SENSE) imaging, compressed sensing (C-SENSE), and compressed SENSE acceleration with an artificial intelligence deep learning-based technique (C-SENSE AI), was compared at different acceleration factors and flip angles using ROI-based analysis. ADC bias was assessed by Lin's Concordance correlation coefficient (CCC) followed by bootstrapping to calculate confidence intervals (CI). ADC random measurement error (RME) was assessed by the mean coefficient of variation (CV¯) and non-parametric statistical tests. RESULTS The simulations predicted increasingly negative bias and loss of precision towards lower SNR. These effects were confirmed in phantom measurements of increasing acceleration, for which CCC decreased from 0.947 to 0.279 and CV¯ increased from 0.043 to 0.439, and of decreasing flip angle, for which CCC decreased from 0.990 to 0.063 and CV¯ increased from 0.037 to 0.508. At high acceleration and low flip angle, C-SENSE AI reconstruction yielded best denoised ADC maps. For the lowest investigated flip angle, CCC = {0.630, 0.771 and 0.987} and CV¯={0.508, 0.426 and 0.254} were obtained for {SENSE, C-SENSE, C-SENSE AI}, the improvement by C-SENSE AI being significant as compared to the other methods (CV: p = 0.033 for C-SENSE AI vs. C-SENSE and p < 0.001 for C-SENSE AI vs. SENSE; CCC: non-overlapping CI between reconstruction methods). For the highest investigated acceleration factor, CCC = {0.479,0.926,0.960} and CV¯={0.519,0.119,0.118} were found, confirming the reduction of bias and RME by C-SENSE AI as compared to C-SENSE (by trend) and to SENSE (CV: p < 0.001; CCC: non-overlapping CI). CONCLUSION ADC bias and random measurement error in DWI at low SNR, typically associated with scan acceleration, can be effectively reduced by deep-learning based C-SENSE AI reconstruction.
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Affiliation(s)
- Teresa Lemainque
- Department of Diagnostic and Interventional Radiology, Medical Faculty, RWTH Aachen University, 52074 Aachen, Germany.
| | | | - Chiara Morsch
- Department of Diagnostic and Interventional Radiology, Medical Faculty, RWTH Aachen University, 52074 Aachen, Germany
| | - Elene Iordanishvili
- Department of Diagnostic and Interventional Radiology, Medical Faculty, RWTH Aachen University, 52074 Aachen, Germany
| | - Alexandra Barabasch
- Department of Diagnostic and Interventional Radiology, Medical Faculty, RWTH Aachen University, 52074 Aachen, Germany
| | - Maximilian Schulze-Hagen
- Department of Diagnostic and Interventional Radiology, Medical Faculty, RWTH Aachen University, 52074 Aachen, Germany
| | | | - Christiane Kuhl
- Department of Diagnostic and Interventional Radiology, Medical Faculty, RWTH Aachen University, 52074 Aachen, Germany
| | - Shuo Zhang
- Philips GmbH Market DACH, Hamburg, Germany
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Aono S, Tsuneta S, Nishioka N, Aoike T, Hirayama H, Ishizaka K, Kwon J, Yoneyama M, Fujima N, Kudo K. Comparison of Echo-Planar Imaging and Compressed Sensing in the Estimation of Flow Metrics from Aortic 4D Flow MR Imaging: A Healthy Volunteer Study. Magn Reson Med Sci 2024:mp.2023-0011. [PMID: 38556273 DOI: 10.2463/mrms.mp.2023-0011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/02/2024] Open
Abstract
PURPOSE Prolonged scanning of time-resolved 3D phase-contrast MRI (4D flow MRI) limits its routine use in clinical practice. An echo-planar imaging (EPI)-based sequence and compressed sensing can reduce the scan duration. We aimed to determine the impact of EPI for 4D flow MRI on the scan duration, image quality, and quantitative flow metrics. METHODS This was a prospective study of 15 healthy volunteers (all male, mean age 33 ± 5 years). Conventional sensitivity encoding (SENSE), EPI with SENSE (EPI), and compressed SENSE (CS) (reduction factors: 6 and 12, respectively) were scanned.Scan duration, qualitative indexes of image quality, and quantitative flow parameters of net flow volume, maximum flow velocity, wall shear stress (WSS), and energy loss (EL) in the ascending aorta were assessed. Two-dimensional phase-contrast cine MRI (2D-PC) was considered the gold standard of net flow volume and maximum flow velocity. RESULTS Compared to SENSE, EPI and CS12 shortened scan durations by 71% and 73% (EPI, 4 min 39 sec; CS6, 7 min 29 sec; CS12, 4 min 14 sec; and SENSE, 15 min 51 sec). Visual image quality was significantly better for EPI than for SENSE and CS (P < 0.001). The net flow volumes obtained with SENSE, EPI, and CS12 and those obtained with 2D-PC were correlated well (r = 0.950, 0.871, and 0.850, respectively). However, the maximum velocity obtained with EPI was significantly underestimated (P < 0.010). The average WSS was significantly higher with EPI than with SENSE, CS6, and CS12 (P < 0.001, P = 0.040, and P = 0.012, respectively). The EL was significantly lower with EPI than with CS6 and CS12 (P = 0.002 and P = 0.007, respectively). CONCLUSION EPI reduced the scan duration, improved visual image quality, and was associated with more accurate net flow volume than CS. However, the flow velocity, WSS, and EL values obtained with EPI and other sequences may not be directly comparable.
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Affiliation(s)
- Satoru Aono
- Department of Radiological Technology, Hokkaido University Hospital, Sapporo, Hokkaido, Japan
| | - Satonori Tsuneta
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, Sapporo, Hokkaido, Japan
| | - Noriko Nishioka
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, Sapporo, Hokkaido, Japan
| | - Takuya Aoike
- Department of Radiological Technology, Hokkaido University Hospital, Sapporo, Hokkaido, Japan
| | - Hiroyuki Hirayama
- Department of Radiological Technology, Hokkaido University Hospital, Sapporo, Hokkaido, Japan
| | - Kinya Ishizaka
- Department of Radiological Technology, Hokkaido University Hospital, Sapporo, Hokkaido, Japan
| | | | | | - Noriyuki Fujima
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, Sapporo, Hokkaido, Japan
| | - Kohsuke Kudo
- Department of Diagnostic Imaging, Hokkaido University Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
- Global Center for Biomedical Science and Engineering, Faculty of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
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Kusama M, Kimura Y, Yoneyama M, Namiki T, Tamaru T, Miyagi K, Sato N. Comparison of 3D Magnetization-transfer- and Spectral-presaturation-with-inversion-recovery-based Neuromelanin Imaging. Magn Reson Med Sci 2024:mp.2023-0095. [PMID: 38382996 DOI: 10.2463/mrms.mp.2023-0095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2024] Open
Abstract
PURPOSE Neuromelanin is visualized by optimizing the conditions of longitudinal relaxation (T1)-weighted imaging (T1WI). Although it was originally developed in 2D imaging, 3D imaging has been also reported, and T1WI sequences with magnetization transfer (MT) pulses are now widely used in 3D gradient echo (GRE) sequences. In this study, we assert that the use of spectral presaturation with inversion recovery (SPIR) may also be useful as an alternative to MT pulses, and we optimize SPIR and compare it with MT. METHODS Neuromelanin images with MT pulse and SPIR (flip angles [FAs] = 19º, 22º, and 25º) were acquired from 30 healthy volunteers. To achieve the same acquisition time of 5 min, the slab thickness of the MT images was less than 1/3 of those of the SPIR images; the acquisition areas for MT and SPIR were the brainstem and the whole brain, respectively. Visual and quantitative evaluation was performed and compared on the four sequences acquired for the substantia nigra pars compacta (SNc) and the locus coeruleus (LC). For visual assessment, we used the mean score from a 3-point scale by two evaluators. For quantitative evaluation, the contrast ratios of SNc and LC were calculated in comparison with the background tissue signal. RESULTS In visual assessments, the mean scores of the SPIR FA19º and FA22º images were better than others in the SNc. Regarding LC, the SPIR FA22º image yielded the best mean score. In quantitative evaluations, the MT image was significantly lower than the other three images in SNc. Regarding LC, there were no significant differences among the four acquired images (MT and SPIR FA19º, FA22º, and FA25º). CONCLUSIONS Detection of neuromelanin in SNc and LC was improved by the use of SPIR compared to MT pulse in 3D neuromelanin imaging.
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Affiliation(s)
- Midori Kusama
- Department of Radiology, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
| | - Yukio Kimura
- Department of Radiology, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
| | | | | | - Takeshi Tamaru
- Department of Radiology, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
| | - Kenji Miyagi
- Department of Radiology, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
| | - Noriko Sato
- Department of Radiology, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
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Hirano Y, Fujima N, Ishizaka K, Aoike T, Nakagawa J, Yoneyama M, Kudo K. Utility of Echo Planar Imaging With Compressed Sensing-Sensitivity Encoding (EPICS) for the Evaluation of the Head and Neck Region. Cureus 2024; 16:e54203. [PMID: 38371431 PMCID: PMC10869950 DOI: 10.7759/cureus.54203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/13/2024] [Indexed: 02/20/2024] Open
Abstract
Purpose This study aimed to compare the image quality between echo planar imaging (EPI) with compressed sensing-sensitivity encoding (EPICS)-based diffusion-weighted imaging (DWI) and conventional parallel imaging (PI)-based DWI of the head and neck. Materials and methods Ten healthy volunteers participated in this study. EPICS-DWI was acquired based on an axial spin-echo EPI sequence with EPICS acceleration factors of 2, 3, and 4, respectively. Conventional PI-DWI was acquired using the same acceleration factors (i.e., 2, 3, and 4). Quantitative assessment was performed by measuring the signal-to-noise ratio (SNR) and apparent diffusion coefficient (ADC) in a circular region of interest (ROI) on the parotid and submandibular glands. For qualitative evaluation, a three-point visual grading system was used to assess the (1) overall image quality and (2) degree of image distortion. Results In the quantitative assessment, the SNR of the parotid gland in EPICS-DWI was significantly higher than that of PI-DWI in acceleration factors of 3 and 4 (p<0.05). In a comparison of ADC values, significant differences were not observed between EPICS-DWI and PI-DWI. In the qualitative assessment, the overall image quality of EPICS-DWI was significantly higher than that of PI-DWI for acceleration factors 3 and 4 (p<0.05). The degree of image distortion was significantly larger in EPICS-DWI with an acceleration factor of 2 than that of 3 or 4 (p<0.01, respectively). Conclusion Under the appropriate parameter setting, EPICS-DWI demonstrated higher SNR and better overall image quality for head and neck imaging than PI-DWI, without increasing image distortion.
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Affiliation(s)
- Yuya Hirano
- Department of Radiological Technology, Hokkaido University Hospital, Sapporo, JPN
| | - Noriyuki Fujima
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, Sapporo, JPN
| | - Kinya Ishizaka
- Department of Radiological Technology, Hokkaido University Hospital, Sapporo, JPN
| | - Takuya Aoike
- Department of Radiological Technology, Hokkaido University Hospital, Sapporo, JPN
| | - Junichi Nakagawa
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, Sapporo, JPN
| | | | - Kohsuke Kudo
- Department of Diagnostic Imaging, Hokkaido University Graduate School of Medicine, Sapporo, JPN
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Yamashita K, Yoneyama M, Kikuchi K, Wada T, Murazaki H, Watanuki H, Mikayama R, Ishigami K, Togao O. Reproducibility of quantitative ADC, T1, and T2 measurement on the cerebral cortex: Utility of whole brain echo-planar DWI with compressed SENSE (EPICS-DWI): A pilot study. Eur J Radiol Open 2023; 11:100516. [PMID: 37609044 PMCID: PMC10440392 DOI: 10.1016/j.ejro.2023.100516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 07/30/2023] [Accepted: 08/08/2023] [Indexed: 08/24/2023] Open
Abstract
Purpose To assess the reproducibility of ADC, T1, T2, and proton density (PD) measurements on the cortex across the entire brain using high-resolution pseudo-3D diffusion-weighted imaging using echo-planar imaging with compressed SENSE (EPICS-DWI) and 3D quantification with an interleaved Look-Locker acquisition sequence with T2 preparation pulse (3D-QALAS) in normal healthy adults. Methods Twelve healthy participants (median age, 33 years; range, 28-51 years) were recruited to evaluate the reproducibility of whole-brain EPICS-DWI and synthetic MRI. EPICS-DWI utilizes a compressed SENSE reconstruction framework while maintaining the EPI sampling pattern. The 3D-QALAS sequence is based on multi-acquisition 3D gradient echo, with five acquisitions equally spaced in time, interleaved with a T2 preparation pulse and an inversion pulse. EPICS-DWI (b values, 0 and 1000 s/mm2) and 3D-QALAS sequence with identical voxel size on a 3.0-T MR system were performed twice (for test-retest scan). Intraclass correlation coefficients (ICCs) for ADC, T1, T2, and PD for all parcellated volume of interest (VOI) per subject on scan-rescan tests were calculated to assess reproducibility. Bland-Altman plots were used to investigate discrepancies in ADCs, T1s, T2s, and PDs obtained from the two MR scans. Results The ICC of ADCs was 0.785, indicating "good" reproducibility. The ICCs of T1s, T2s, and PDs were 0.986, 0.978, and 0.968, indicating "excellent" reproducibility. Conclusion The combination of EPICS-DWI and 3D-QALAS sequences with identical voxel size could reproducible ADC, T1, T2, and PD measurements for the cortex across the entire brain in healthy adults.
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Affiliation(s)
- Koji Yamashita
- Departments of Radiology Informatics and Network, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Masami Yoneyama
- Philips Japan, 13-37, Kohnan 2-chome, Minato-ku, Tokyo 108-8507, Japan
| | - Kazufumi Kikuchi
- Departments of Clinical Radiology, and Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Tatsuhiro Wada
- Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Japan
| | - Hiroo Murazaki
- Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Japan
| | - Hiroaki Watanuki
- Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Japan
| | - Ryoji Mikayama
- Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Japan
| | - Kousei Ishigami
- Departments of Clinical Radiology, and Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Osamu Togao
- Departments of Molecular Imaging and Diagnosis, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
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Fujima N, Nakagawa J, Kameda H, Ikebe Y, Harada T, Shimizu Y, Tsushima N, Kano S, Homma A, Kwon J, Yoneyama M, Kudo K. Improvement of image quality in diffusion-weighted imaging with model-based deep learning reconstruction for evaluations of the head and neck. MAGMA 2023:10.1007/s10334-023-01129-4. [PMID: 37989922 DOI: 10.1007/s10334-023-01129-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Revised: 10/18/2023] [Accepted: 10/23/2023] [Indexed: 11/23/2023]
Abstract
OBJECTIVES To investigate the utility of deep learning (DL)-based image reconstruction using a model-based approach in head and neck diffusion-weighted imaging (DWI). MATERIALS AND METHODS We retrospectively analyzed the cases of 41 patients who underwent head/neck DWI. The DWI in 25 patients demonstrated an untreated lesion. We performed qualitative and quantitative assessments in the DWI analyses with both deep learning (DL)- and conventional parallel imaging (PI)-based reconstructions. For the qualitative assessment, we visually evaluated the overall image quality, soft tissue conspicuity, degree of artifact(s), and lesion conspicuity based on a five-point system. In the quantitative assessment, we measured the signal-to-noise ratio (SNR) of the bilateral parotid glands, submandibular gland, the posterior muscle, and the lesion. We then calculated the contrast-to-noise ratio (CNR) between the lesion and the adjacent muscle. RESULTS Significant differences were observed in the qualitative analysis between the DWI with PI-based and DL-based reconstructions for all of the evaluation items (p < 0.001). In the quantitative analysis, significant differences in the SNR and CNR between the DWI with PI-based and DL-based reconstructions were observed for all of the evaluation items (p = 0.002 ~ p < 0.001). DISCUSSION DL-based image reconstruction with the model-based technique effectively provided sufficient image quality in head/neck DWI.
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Affiliation(s)
- Noriyuki Fujima
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, N14 W5, Kita-Ku, Sapporo, 060-8638, Japan.
| | - Junichi Nakagawa
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, N14 W5, Kita-Ku, Sapporo, 060-8638, Japan
| | - Hiroyuki Kameda
- Faculty of Dental Medicine Department of Radiology, Hokkaido University, N13 W7, Kita-Ku, Sapporo, Hokkaido, 060-8586, Japan
| | - Yohei Ikebe
- Department of Diagnostic Imaging, Graduate School of Medicine, Hokkaido University, N15 W7, Kita-Ku, Sapporo, Hokkaido, 060-8638, Japan
- Center for Cause of Death Investigation, Faculty of Medicine, Hokkaido University, N15 W7, Kita-Ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Taisuke Harada
- Center for Cause of Death Investigation, Faculty of Medicine, Hokkaido University, N15 W7, Kita-Ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Yukie Shimizu
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, N14 W5, Kita-Ku, Sapporo, 060-8638, Japan
| | - Nayuta Tsushima
- Department of Otolaryngology-Head and Neck Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, N15 W7, Kita Ku, Sapporo, 060-8638, Japan
| | - Satoshi Kano
- Department of Otolaryngology-Head and Neck Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, N15 W7, Kita Ku, Sapporo, 060-8638, Japan
| | - Akihiro Homma
- Department of Otolaryngology-Head and Neck Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, N15 W7, Kita Ku, Sapporo, 060-8638, Japan
| | - Jihun Kwon
- Philips Japan, 3-37 Kohnan 2-Chome, Minato-Ku, Tokyo, 108-8507, Japan
| | - Masami Yoneyama
- Philips Japan, 3-37 Kohnan 2-Chome, Minato-Ku, Tokyo, 108-8507, Japan
| | - Kohsuke Kudo
- Department of Diagnostic Imaging, Graduate School of Medicine, Hokkaido University, N15 W7, Kita-Ku, Sapporo, Hokkaido, 060-8638, Japan
- Medical AI Research and Development Center, Hokkaido University Hospital, N14 W5, Kita-Ku, Sapporo, Hokkaido, 060-8638, Japan
- Global Center for Biomedical Science and Engineering, Faculty of Medicine, Hokkaido University, N14 W5, Kita-Ku, Sapporo, Hokkaido, 060-8638, Japan
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Morita K, Uetani H, Nakaura T, Yoneyama M, Nagayama Y, Kidoh M, Shinojima N, Hamasaki T, Mukasa A, Hirai T. Accelerating TOF-MRA: The impact of the combined use of compressed sensitivity encoding and spiral imaging. Magn Reson Imaging 2023; 103:28-36. [PMID: 37406743 DOI: 10.1016/j.mri.2023.06.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 06/29/2023] [Accepted: 06/29/2023] [Indexed: 07/07/2023]
Abstract
PURPOSE To evaluate the image quality of the combined technique of compressed sensitivity encoding (CS) and spiral imaging in time-of-flight magnetic resonance angiography (TOF-MRA), which is approximately 2.5 times faster than conventional methods. METHODS Twenty volunteers underwent four TOF-MRA sequences: sensitivity encoding (SENSE) with acceleration factor of 4 (acquisition time: 4:55 min), CS with acceleration factor of 10.9, and spiral and CS-spiral (both 1:55 min). A quantitative image analysis (signal-to-noise ratio [SNR], contrast, and full width at half maximum [FWHM] edge criterion measurements) was performed on four TOF sequences. For qualitative image analysis, two board-certified radiologists evaluated the overall depiction of the proximal, intermediate, and distal branches in CS, spiral, and CS-spiral images using SENSE as a reference. RESULTS The SNR of BA in spiral and CS-spiral imaging was significantly lower than that in SENSE (p = 0.009). The contrasts of ACA and BA in CS-spiral were significantly higher and those in spiral were significantly lower than those in SENSE (p < 0.001). The FWHM in the CS image was significantly higher than that of SENSE; however, no significant differences were observed between the spiral or CS-spiral and SENSE. In qualitative analysis, the depiction of proximal vascular branches was significantly impaired in spiral than in others and that of distal vascular branches was significantly impaired in CS than in others (p < 0.001). CONCLUSIONS In TOF-MRA, which is approximately 2.5 times faster than conventional methods, the combined use of CS and spiral imaging demonstrated an improvement in image quality compared to either CS or spiral imaging alone. SUMMARY STATEMENT The image quality of Compressed SENSE and spiral imaging is particularly poor in the proximal and distal vascular branches, respectively at an extremely high acceleration factor; however, CS-spiral provided stable image quality in all regions as compared with the SENSE technique.
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Affiliation(s)
- Kosuke Morita
- Department of Radiology, Kumamoto University Hospital, Honjo 1-1-1, Kumamoto, Japan
| | - Hiroyuki Uetani
- Department of Diagnostic Radiology, Graduate School of Medical Sciences, Kumamoto University, Honjo 1-1-1, Kumamoto, Japan
| | - Takeshi Nakaura
- Department of Diagnostic Radiology, Graduate School of Medical Sciences, Kumamoto University, Honjo 1-1-1, Kumamoto, Japan.
| | | | - Yasunori Nagayama
- Department of Diagnostic Radiology, Graduate School of Medical Sciences, Kumamoto University, Honjo 1-1-1, Kumamoto, Japan
| | - Masafumi Kidoh
- Department of Diagnostic Radiology, Graduate School of Medical Sciences, Kumamoto University, Honjo 1-1-1, Kumamoto, Japan
| | - Naoki Shinojima
- Department of Neurosurgery, Graduate School of Medical Sciences, Kumamoto University, Honjo 1-1-1, Kumamoto, Japan
| | - Tadashi Hamasaki
- Department of Neurosurgery, Graduate School of Medical Sciences, Kumamoto University, Honjo 1-1-1, Kumamoto, Japan
| | - Akitake Mukasa
- Department of Neurosurgery, Graduate School of Medical Sciences, Kumamoto University, Honjo 1-1-1, Kumamoto, Japan
| | - Toshinori Hirai
- Department of Diagnostic Radiology, Graduate School of Medical Sciences, Kumamoto University, Honjo 1-1-1, Kumamoto, Japan
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Fujita S, Sano K, Cruz G, Velasco C, Kawasaki H, Fukumura Y, Yoneyama M, Suzuki A, Yamamoto K, Morita Y, Arai T, Fukunaga I, Uchida W, Kamagata K, Abe O, Kuwatsuru R, Saiura A, Ikejima K, Botnar R, Prieto C, Aoki S. MR Fingerprinting for Contrast Agent-free and Quantitative Characterization of Focal Liver Lesions. Radiol Imaging Cancer 2023; 5:e230036. [PMID: 37999629 DOI: 10.1148/rycan.230036] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2023]
Abstract
Purpose To evaluate the feasibility of liver MR fingerprinting (MRF) for quantitative characterization and diagnosis of focal liver lesions. Materials and Methods This single-site, prospective study included 89 participants (mean age, 62 years ± 15 [SD]; 45 women, 44 men) with various focal liver lesions who underwent MRI between October 2021 and August 2022. The participants underwent routine clinical MRI, non-contrast-enhanced liver MRF, and reference quantitative MRI with a 1.5-T MRI scanner. The bias and repeatability of the MRF measurements were assessed using linear regression, Bland-Altman plots, and coefficients of variation. The diagnostic capability of MRF-derived T1, T2, T2*, proton density fat fraction (PDFF), and a combination of these metrics to distinguish benign from malignant lesions was analyzed according to the area under the receiver operating characteristic curve (AUC). Results Liver MRF measurements showed moderate to high agreement with reference measurements (intraclass correlation = 0.94, 0.77, 0.45, and 0.61 for T1, T2, T2*, and PDFF, respectively), with underestimation of T2 values (mean bias in lesion = -0.5%, -29%, 5.8%, and -8.2% for T1, T2, T2*, and PDFF, respectively). The median coefficients of variation for repeatability of T1, T2, and T2* values were 2.5% (IQR, 3.6%), 3.1% (IQR, 5.6%), and 6.6% (IQR, 13.9%), respectively. After considering multicollinearity, a combination of MRF measurements showed a high diagnostic performance in differentiating benign from malignant lesions (AUC = 0.92 [95% CI: 0.86, 0.98]). Conclusion Liver MRF enabled the quantitative characterization of various focal liver lesions in a single breath-hold acquisition. Keywords: MR Imaging, Abdomen/GI, Liver, Imaging Sequences, Technical Aspects, Tissue Characterization, Technology Assessment, Diagnosis, Liver Lesions, MR Fingerprinting, Quantitative Characterization Supplemental material is available for this article. © RSNA, 2023.
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Affiliation(s)
- Shohei Fujita
- From the Departments of Radiology (S.F., K.S., H.K., A. Suzuki, K.Y., Y.M., T.A., I.F., W.U., K.K., R.K., S.A.), Human Pathology (Y.F.), Hepatobiliary-Pancreatic Surgery (A. Saiura), and Gastroenterology (K.I.), Juntendo University School of Medicine, 1-2-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, The University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, England (G.C., C.V., R.B., C.P.); Department of Radiology, University of Michigan, Ann Arbor, Mich (G.C.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.B., C.P.); and Millennium Institute for Intelligent Healthcare Engineering, Santiago, Chile (R.B., C.P.)
| | - Katsuhiro Sano
- From the Departments of Radiology (S.F., K.S., H.K., A. Suzuki, K.Y., Y.M., T.A., I.F., W.U., K.K., R.K., S.A.), Human Pathology (Y.F.), Hepatobiliary-Pancreatic Surgery (A. Saiura), and Gastroenterology (K.I.), Juntendo University School of Medicine, 1-2-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, The University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, England (G.C., C.V., R.B., C.P.); Department of Radiology, University of Michigan, Ann Arbor, Mich (G.C.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.B., C.P.); and Millennium Institute for Intelligent Healthcare Engineering, Santiago, Chile (R.B., C.P.)
| | - Gastao Cruz
- From the Departments of Radiology (S.F., K.S., H.K., A. Suzuki, K.Y., Y.M., T.A., I.F., W.U., K.K., R.K., S.A.), Human Pathology (Y.F.), Hepatobiliary-Pancreatic Surgery (A. Saiura), and Gastroenterology (K.I.), Juntendo University School of Medicine, 1-2-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, The University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, England (G.C., C.V., R.B., C.P.); Department of Radiology, University of Michigan, Ann Arbor, Mich (G.C.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.B., C.P.); and Millennium Institute for Intelligent Healthcare Engineering, Santiago, Chile (R.B., C.P.)
| | - Carlos Velasco
- From the Departments of Radiology (S.F., K.S., H.K., A. Suzuki, K.Y., Y.M., T.A., I.F., W.U., K.K., R.K., S.A.), Human Pathology (Y.F.), Hepatobiliary-Pancreatic Surgery (A. Saiura), and Gastroenterology (K.I.), Juntendo University School of Medicine, 1-2-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, The University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, England (G.C., C.V., R.B., C.P.); Department of Radiology, University of Michigan, Ann Arbor, Mich (G.C.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.B., C.P.); and Millennium Institute for Intelligent Healthcare Engineering, Santiago, Chile (R.B., C.P.)
| | - Hideo Kawasaki
- From the Departments of Radiology (S.F., K.S., H.K., A. Suzuki, K.Y., Y.M., T.A., I.F., W.U., K.K., R.K., S.A.), Human Pathology (Y.F.), Hepatobiliary-Pancreatic Surgery (A. Saiura), and Gastroenterology (K.I.), Juntendo University School of Medicine, 1-2-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, The University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, England (G.C., C.V., R.B., C.P.); Department of Radiology, University of Michigan, Ann Arbor, Mich (G.C.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.B., C.P.); and Millennium Institute for Intelligent Healthcare Engineering, Santiago, Chile (R.B., C.P.)
| | - Yuki Fukumura
- From the Departments of Radiology (S.F., K.S., H.K., A. Suzuki, K.Y., Y.M., T.A., I.F., W.U., K.K., R.K., S.A.), Human Pathology (Y.F.), Hepatobiliary-Pancreatic Surgery (A. Saiura), and Gastroenterology (K.I.), Juntendo University School of Medicine, 1-2-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, The University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, England (G.C., C.V., R.B., C.P.); Department of Radiology, University of Michigan, Ann Arbor, Mich (G.C.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.B., C.P.); and Millennium Institute for Intelligent Healthcare Engineering, Santiago, Chile (R.B., C.P.)
| | - Masami Yoneyama
- From the Departments of Radiology (S.F., K.S., H.K., A. Suzuki, K.Y., Y.M., T.A., I.F., W.U., K.K., R.K., S.A.), Human Pathology (Y.F.), Hepatobiliary-Pancreatic Surgery (A. Saiura), and Gastroenterology (K.I.), Juntendo University School of Medicine, 1-2-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, The University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, England (G.C., C.V., R.B., C.P.); Department of Radiology, University of Michigan, Ann Arbor, Mich (G.C.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.B., C.P.); and Millennium Institute for Intelligent Healthcare Engineering, Santiago, Chile (R.B., C.P.)
| | - Akiyoshi Suzuki
- From the Departments of Radiology (S.F., K.S., H.K., A. Suzuki, K.Y., Y.M., T.A., I.F., W.U., K.K., R.K., S.A.), Human Pathology (Y.F.), Hepatobiliary-Pancreatic Surgery (A. Saiura), and Gastroenterology (K.I.), Juntendo University School of Medicine, 1-2-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, The University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, England (G.C., C.V., R.B., C.P.); Department of Radiology, University of Michigan, Ann Arbor, Mich (G.C.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.B., C.P.); and Millennium Institute for Intelligent Healthcare Engineering, Santiago, Chile (R.B., C.P.)
| | - Kotaro Yamamoto
- From the Departments of Radiology (S.F., K.S., H.K., A. Suzuki, K.Y., Y.M., T.A., I.F., W.U., K.K., R.K., S.A.), Human Pathology (Y.F.), Hepatobiliary-Pancreatic Surgery (A. Saiura), and Gastroenterology (K.I.), Juntendo University School of Medicine, 1-2-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, The University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, England (G.C., C.V., R.B., C.P.); Department of Radiology, University of Michigan, Ann Arbor, Mich (G.C.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.B., C.P.); and Millennium Institute for Intelligent Healthcare Engineering, Santiago, Chile (R.B., C.P.)
| | - Yuichi Morita
- From the Departments of Radiology (S.F., K.S., H.K., A. Suzuki, K.Y., Y.M., T.A., I.F., W.U., K.K., R.K., S.A.), Human Pathology (Y.F.), Hepatobiliary-Pancreatic Surgery (A. Saiura), and Gastroenterology (K.I.), Juntendo University School of Medicine, 1-2-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, The University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, England (G.C., C.V., R.B., C.P.); Department of Radiology, University of Michigan, Ann Arbor, Mich (G.C.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.B., C.P.); and Millennium Institute for Intelligent Healthcare Engineering, Santiago, Chile (R.B., C.P.)
| | - Takashi Arai
- From the Departments of Radiology (S.F., K.S., H.K., A. Suzuki, K.Y., Y.M., T.A., I.F., W.U., K.K., R.K., S.A.), Human Pathology (Y.F.), Hepatobiliary-Pancreatic Surgery (A. Saiura), and Gastroenterology (K.I.), Juntendo University School of Medicine, 1-2-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, The University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, England (G.C., C.V., R.B., C.P.); Department of Radiology, University of Michigan, Ann Arbor, Mich (G.C.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.B., C.P.); and Millennium Institute for Intelligent Healthcare Engineering, Santiago, Chile (R.B., C.P.)
| | - Issei Fukunaga
- From the Departments of Radiology (S.F., K.S., H.K., A. Suzuki, K.Y., Y.M., T.A., I.F., W.U., K.K., R.K., S.A.), Human Pathology (Y.F.), Hepatobiliary-Pancreatic Surgery (A. Saiura), and Gastroenterology (K.I.), Juntendo University School of Medicine, 1-2-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, The University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, England (G.C., C.V., R.B., C.P.); Department of Radiology, University of Michigan, Ann Arbor, Mich (G.C.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.B., C.P.); and Millennium Institute for Intelligent Healthcare Engineering, Santiago, Chile (R.B., C.P.)
| | - Wataru Uchida
- From the Departments of Radiology (S.F., K.S., H.K., A. Suzuki, K.Y., Y.M., T.A., I.F., W.U., K.K., R.K., S.A.), Human Pathology (Y.F.), Hepatobiliary-Pancreatic Surgery (A. Saiura), and Gastroenterology (K.I.), Juntendo University School of Medicine, 1-2-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, The University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, England (G.C., C.V., R.B., C.P.); Department of Radiology, University of Michigan, Ann Arbor, Mich (G.C.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.B., C.P.); and Millennium Institute for Intelligent Healthcare Engineering, Santiago, Chile (R.B., C.P.)
| | - Koji Kamagata
- From the Departments of Radiology (S.F., K.S., H.K., A. Suzuki, K.Y., Y.M., T.A., I.F., W.U., K.K., R.K., S.A.), Human Pathology (Y.F.), Hepatobiliary-Pancreatic Surgery (A. Saiura), and Gastroenterology (K.I.), Juntendo University School of Medicine, 1-2-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, The University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, England (G.C., C.V., R.B., C.P.); Department of Radiology, University of Michigan, Ann Arbor, Mich (G.C.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.B., C.P.); and Millennium Institute for Intelligent Healthcare Engineering, Santiago, Chile (R.B., C.P.)
| | - Osamu Abe
- From the Departments of Radiology (S.F., K.S., H.K., A. Suzuki, K.Y., Y.M., T.A., I.F., W.U., K.K., R.K., S.A.), Human Pathology (Y.F.), Hepatobiliary-Pancreatic Surgery (A. Saiura), and Gastroenterology (K.I.), Juntendo University School of Medicine, 1-2-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, The University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, England (G.C., C.V., R.B., C.P.); Department of Radiology, University of Michigan, Ann Arbor, Mich (G.C.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.B., C.P.); and Millennium Institute for Intelligent Healthcare Engineering, Santiago, Chile (R.B., C.P.)
| | - Ryohei Kuwatsuru
- From the Departments of Radiology (S.F., K.S., H.K., A. Suzuki, K.Y., Y.M., T.A., I.F., W.U., K.K., R.K., S.A.), Human Pathology (Y.F.), Hepatobiliary-Pancreatic Surgery (A. Saiura), and Gastroenterology (K.I.), Juntendo University School of Medicine, 1-2-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, The University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, England (G.C., C.V., R.B., C.P.); Department of Radiology, University of Michigan, Ann Arbor, Mich (G.C.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.B., C.P.); and Millennium Institute for Intelligent Healthcare Engineering, Santiago, Chile (R.B., C.P.)
| | - Akio Saiura
- From the Departments of Radiology (S.F., K.S., H.K., A. Suzuki, K.Y., Y.M., T.A., I.F., W.U., K.K., R.K., S.A.), Human Pathology (Y.F.), Hepatobiliary-Pancreatic Surgery (A. Saiura), and Gastroenterology (K.I.), Juntendo University School of Medicine, 1-2-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, The University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, England (G.C., C.V., R.B., C.P.); Department of Radiology, University of Michigan, Ann Arbor, Mich (G.C.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.B., C.P.); and Millennium Institute for Intelligent Healthcare Engineering, Santiago, Chile (R.B., C.P.)
| | - Kenichi Ikejima
- From the Departments of Radiology (S.F., K.S., H.K., A. Suzuki, K.Y., Y.M., T.A., I.F., W.U., K.K., R.K., S.A.), Human Pathology (Y.F.), Hepatobiliary-Pancreatic Surgery (A. Saiura), and Gastroenterology (K.I.), Juntendo University School of Medicine, 1-2-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, The University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, England (G.C., C.V., R.B., C.P.); Department of Radiology, University of Michigan, Ann Arbor, Mich (G.C.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.B., C.P.); and Millennium Institute for Intelligent Healthcare Engineering, Santiago, Chile (R.B., C.P.)
| | - René Botnar
- From the Departments of Radiology (S.F., K.S., H.K., A. Suzuki, K.Y., Y.M., T.A., I.F., W.U., K.K., R.K., S.A.), Human Pathology (Y.F.), Hepatobiliary-Pancreatic Surgery (A. Saiura), and Gastroenterology (K.I.), Juntendo University School of Medicine, 1-2-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, The University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, England (G.C., C.V., R.B., C.P.); Department of Radiology, University of Michigan, Ann Arbor, Mich (G.C.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.B., C.P.); and Millennium Institute for Intelligent Healthcare Engineering, Santiago, Chile (R.B., C.P.)
| | - Claudia Prieto
- From the Departments of Radiology (S.F., K.S., H.K., A. Suzuki, K.Y., Y.M., T.A., I.F., W.U., K.K., R.K., S.A.), Human Pathology (Y.F.), Hepatobiliary-Pancreatic Surgery (A. Saiura), and Gastroenterology (K.I.), Juntendo University School of Medicine, 1-2-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, The University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, England (G.C., C.V., R.B., C.P.); Department of Radiology, University of Michigan, Ann Arbor, Mich (G.C.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.B., C.P.); and Millennium Institute for Intelligent Healthcare Engineering, Santiago, Chile (R.B., C.P.)
| | - Shigeki Aoki
- From the Departments of Radiology (S.F., K.S., H.K., A. Suzuki, K.Y., Y.M., T.A., I.F., W.U., K.K., R.K., S.A.), Human Pathology (Y.F.), Hepatobiliary-Pancreatic Surgery (A. Saiura), and Gastroenterology (K.I.), Juntendo University School of Medicine, 1-2-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, The University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, England (G.C., C.V., R.B., C.P.); Department of Radiology, University of Michigan, Ann Arbor, Mich (G.C.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.B., C.P.); and Millennium Institute for Intelligent Healthcare Engineering, Santiago, Chile (R.B., C.P.)
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Nishioka N, Fujima N, Tsuneta S, Yoneyama M, Matsumoto R, Abe T, Kimura R, Sakamoto K, Kato F, Kudo K. Clinical utility of single-shot echo-planar diffusion-weighted imaging using L1-regularized iterative sensitivity encoding in prostate MRI. Medicine (Baltimore) 2023; 102:e33639. [PMID: 37115048 PMCID: PMC10146059 DOI: 10.1097/md.0000000000033639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Revised: 04/05/2023] [Accepted: 04/06/2023] [Indexed: 04/29/2023] Open
Abstract
We investigated the ability of echo-planar imaging with L1-regularized iterative sensitivity encoding-based diffusion-weighted imaging (DWI) to improve the image quality and reduce the scanning time in prostate magnetic resonance imaging. We retrospectively analyzed 109 cases of prostate magnetic resonance imaging. We compared variables in the quantitative and qualitative assessments among 3 imaging groups: conventional parallel imaging-based DWI (PI-DWI) with an acquisition time of 3 minutes 15 seconds; echo-planar imaging with L1-regularized iterative sensitivity encoding-based DWI (L1-DWI) with a normal acquisition time (L1-DWINEX12) of 3 minutes 15 seconds; and L1-DWI with a half acquisition time (L1-DWINEX6) of 1 minute 45 seconds. As a quantitative assessment, the signal-to-noise ratio (SNR) of DWI (SNR-DWI), the contrast-to-noise ratio (CNR) of DWI (CNR-DWI), and the CNR of apparent diffusion coefficient were measured. As a qualitative assessment, the image quality and visual detectability of prostate carcinoma were evaluated. In the quantitative analysis, L1-DWINEX12 showed significantly higher SNR-DWI than PI-DWI (P = .0058) and L1-DWINEX6 (P < .0001). In the qualitative analysis, the image quality score for L1-DWINEX12 was significantly higher than those of PI-DWI and L1-DWINEX6. A non-inferiority assessment demonstrated that L1-DWINEX6 was non-inferior to PI-DWI in terms of both quantitative CNR-DWI and qualitative grading of image quality with a <20% inferior margin. L1-DWI successfully demonstrated a reduced scanning time while maintaining good image quality.
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Affiliation(s)
- Noriko Nishioka
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, Kita-Ku, Sapporo, Japan
- Department of Diagnostic Imaging, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-Ku, Sapporo, Japan
| | - Noriyuki Fujima
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, Kita-Ku, Sapporo, Japan
| | - Satonori Tsuneta
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, Kita-Ku, Sapporo, Japan
| | | | - Ryuji Matsumoto
- Department of Renal and Genitourinary Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-Ku, Sapporo, Japan
| | - Takashige Abe
- Department of Renal and Genitourinary Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-Ku, Sapporo, Japan
| | - Rina Kimura
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, Kita-Ku, Sapporo, Japan
- Department of Diagnostic Imaging, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-Ku, Sapporo, Japan
| | - Keita Sakamoto
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, Kita-Ku, Sapporo, Japan
| | - Fumi Kato
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, Kita-Ku, Sapporo, Japan
| | - Kohsuke Kudo
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, Kita-Ku, Sapporo, Japan
- Department of Diagnostic Imaging, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-Ku, Sapporo, Japan
- Department of Advanced Diagnostic Imaging Development, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-Ku, Sapporo, Japan
- Global Center for Biomedical Science and Engineering, Faculty of Medicine, Hokkaido University, Kita-Ku, Sapporo, Hokkaido, Japan
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11
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Bode M, Charlotte Huck L, Zhang S, Nolte T, Yoneyama M, Nebelung S, Katharina Kuhl C. Clinical evaluation of cylindrical regional suppression in dynamic contrast-enhanced breast MRI: An intra-individual comparison study on image quality and lesion conspicuity. Eur J Radiol 2023; 161:110724. [PMID: 36764020 DOI: 10.1016/j.ejrad.2023.110724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 01/09/2023] [Accepted: 01/31/2023] [Indexed: 02/05/2023]
Abstract
PURPOSE To evaluate the effect of a cylindrical regional-suppression technique (CREST) on image quality and lesion conspicuity in dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) of the breast. METHOD This was a comparative study of 67 women with 44 lesions who underwent breast DCE-MRI with CREST (CREST-DCE) and had a previous DCE-MRI without CREST (conv-DCE) available. Two radiologists assessed image quality parameters and lesion conspicuity using five-point Likert scales. In an intra-individual comparison, the effects of CREST on image quality (strong degradation to strong improvement) were assessed. Moreover, both radiologists identified the post-contrast phase, which benefited the most from using CREST in direct comparison. The statistical analysis included the Wilcoxon signed-rank test. RESULTS Cardiac motion-rated artefacts were significantly reduced in CREST-DCE compared to conv-DCE (3.6 ± 1.2 [CREST-DCE] vs 2.1 ± 0.8 [conv-DCE], p < 0.001). At the axilla, the visualisation of anatomical structures (3.9 ± 1.0 vs 2.3 ± 1.2, p < 0.001) and the skin contour (4.3 ± 0.8 vs 3.0 ± 1.1, p < 0.001) were significantly improved in CREST-DCE, whereas ghosting artefacts were significantly less pronounced (3.8 ± 1.1 vs 2.4 ± 1.0, p < 0.001). The parasternal region was similarly assessable using both techniques (4.3 ± 1.1 vs 4.2 ± 1.2, p = 0.47). In direct comparison, CREST-DCE images were classified as "improved" in 54/67 and "equivalent" in 13/67 exams. The effects of CREST were found to be most pronounced in the very early post-contrast phase (32/67). The lesion conspicuity was rated similar for CREST and conv-DCE (4.7 ± 0.7 vs 4.8 ± 0.2, p = 0.18). CONCLUSIONS CREST appears to be an effective tool to reduce cardiac motion-related artefacts and, therefore, may improve image quality in breast DCE-MRI without impairing lesion conspicuity.
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Affiliation(s)
- Maike Bode
- Department of Diagnostic and Interventional Radiology, University Hospital Aachen, Aachen, Germany.
| | - Luisa Charlotte Huck
- Department of Diagnostic and Interventional Radiology, University Hospital Aachen, Aachen, Germany
| | - Shuo Zhang
- Department of Diagnostic and Interventional Radiology, University Hospital Aachen, Aachen, Germany; Philips GmbH Market DACH, Hamburg, Germany
| | - Teresa Nolte
- Department of Diagnostic and Interventional Radiology, University Hospital Aachen, Aachen, Germany
| | | | - Sven Nebelung
- Department of Diagnostic and Interventional Radiology, University Hospital Aachen, Aachen, Germany
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12
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Obara M, Kwon J, Yoneyama M, Ueda Y, Cauteren MV. Technical Advancements in Abdominal Diffusion-weighted Imaging. Magn Reson Med Sci 2023; 22:191-208. [PMID: 36928124 PMCID: PMC10086402 DOI: 10.2463/mrms.rev.2022-0107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023] Open
Abstract
Since its first observation in the 18th century, the diffusion phenomenon has been actively studied by many researchers. Diffusion-weighted imaging (DWI) is a technique to probe the diffusion of water molecules and create a MR image with contrast based on the local diffusion properties. The DWI pixel intensity is modulated by the hindrance the diffusing water molecules experience. This hindrance is caused by structures in the tissue and reflects the state of the tissue. This characteristic makes DWI a unique and effective tool to gain more insight into the tissue's pathophysiological condition. In the past decades, DWI has made dramatic technical progress, leading to greater acceptance in clinical practice. In the abdominal region, however, acquiring DWI with good quality is challenging because of several reasons, such as large imaging volume, respiratory and other types of motion, and difficulty in achieving homogeneous fat suppression. In this review, we discuss technical advancements from the past decades that help mitigate these problems common in abdominal imaging. We describe the use of scan acceleration techniques such as parallel imaging and compressed sensing to reduce image distortion in echo planar imaging. Then we compare techniques developed to mitigate issues due to respiratory motion, such as free-breathing, respiratory-triggering, and navigator-based approaches. Commonly used fat suppression techniques are also introduced, and their effectiveness is discussed. Additionally, the influence of the abovementioned techniques on image quality is demonstrated. Finally, we discuss the current and future clinical applications of abdominal DWI, such as whole-body DWI, simultaneous multiple-slice excitation, intravoxel incoherent motion, and the use of artificial intelligence. Abdominal DWI has the potential to develop further in the future, thanks to scan acceleration and image quality improvement driven by technological advancements. The accumulation of clinical proof will further drive clinical acceptance.
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Affiliation(s)
| | | | | | - Yu Ueda
- MR Clinical Science, Philips Japan Ltd
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13
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Fujita S, Sano K, Cruz G, Fukumura Y, Kawasaki H, Fukunaga I, Morita Y, Yoneyama M, Kamagata K, Abe O, Ikejima K, Botnar RM, Prieto C, Aoki S. MR Fingerprinting for Liver Tissue Characterization: A Histopathologic Correlation Study. Radiology 2023; 306:150-159. [PMID: 36040337 DOI: 10.1148/radiol.220736] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Background Liver MR fingerprinting (MRF) enables simultaneous quantification of T1, T2, T2*, and proton density fat fraction (PDFF) maps in single breath-hold acquisitions. Histopathologic correlation studies are desired for its clinical use. Purpose To compare liver MRF-derived metrics with separate reference quantitative MRI in participants with diffuse liver disease, evaluate scan-rescan repeatability of liver MRF, and validate MRF-derived measurements for histologic grading of liver biopsies. Materials and Methods This prospective study included participants with diffuse liver disease undergoing MRI from July 2021 to January 2022. Participants underwent two-dimensional single-section liver MRF and separate reference quantitative MRI. Linear regression, Bland-Altman plots, and coefficients of variation were used to assess the bias and repeatability of liver MRF measurements. For participants undergoing liver biopsy, the association between mapping and histologic grading was evaluated by using the Spearman correlation coefficient. Results Fifty-six participants (mean age, 59 years ± 15 [SD]; 32 women) were included to compare mapping techniques and 23 participants were evaluated with liver biopsy (mean age, 52.7 years ± 12.7; 14 women). The linearity of MRF with reference measurements in participants with diffuse liver disease (R2 value) for T1, T2, T2*, and PDFF maps was 0.86, 0.88, 0.54, and 0.99, respectively. The overall coefficients of variation for repeatability in the liver were 3.2%, 5.5%, 7.1%, and 4.6% for T1, T2, T2*, and PDFF maps, respectively. MRF-derived metrics showed high diagnostic performance in differentiating moderate or severe changes from mild or no changes (area under the receiver operating characteristic curve for fibrosis, inflammation, steatosis, and siderosis: 0.62 [95% CI: 0.52, 0.62], 0.92 [95% CI: 0.88, 0.92], 0.97 [95% CI: 0.96, 0.97], and 0.74 [95% CI: 0.57, 0.74], respectively). Conclusion Liver MR fingerprinting provided repeatable T1, T2, T2*, and proton density fat fraction maps in high agreement with reference quantitative mapping and may correlate with pathologic grades in participants with diffuse liver disease. © RSNA, 2022 Online supplemental material is available for this article.
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Affiliation(s)
- Shohei Fujita
- From the Departments of Radiology (S.F., K.S., H.K., I.F., Y.M., K.K., S.A.), Human Pathology (Y.F.), and Gastroenterology (K.I.), Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom (G.C., R.M.B., C.P.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.M.B., C.P.)
| | - Katsuhiro Sano
- From the Departments of Radiology (S.F., K.S., H.K., I.F., Y.M., K.K., S.A.), Human Pathology (Y.F.), and Gastroenterology (K.I.), Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom (G.C., R.M.B., C.P.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.M.B., C.P.)
| | - Gastao Cruz
- From the Departments of Radiology (S.F., K.S., H.K., I.F., Y.M., K.K., S.A.), Human Pathology (Y.F.), and Gastroenterology (K.I.), Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom (G.C., R.M.B., C.P.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.M.B., C.P.)
| | - Yuki Fukumura
- From the Departments of Radiology (S.F., K.S., H.K., I.F., Y.M., K.K., S.A.), Human Pathology (Y.F.), and Gastroenterology (K.I.), Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom (G.C., R.M.B., C.P.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.M.B., C.P.)
| | - Hideo Kawasaki
- From the Departments of Radiology (S.F., K.S., H.K., I.F., Y.M., K.K., S.A.), Human Pathology (Y.F.), and Gastroenterology (K.I.), Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom (G.C., R.M.B., C.P.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.M.B., C.P.)
| | - Issei Fukunaga
- From the Departments of Radiology (S.F., K.S., H.K., I.F., Y.M., K.K., S.A.), Human Pathology (Y.F.), and Gastroenterology (K.I.), Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom (G.C., R.M.B., C.P.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.M.B., C.P.)
| | - Yuichi Morita
- From the Departments of Radiology (S.F., K.S., H.K., I.F., Y.M., K.K., S.A.), Human Pathology (Y.F.), and Gastroenterology (K.I.), Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom (G.C., R.M.B., C.P.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.M.B., C.P.)
| | - Masami Yoneyama
- From the Departments of Radiology (S.F., K.S., H.K., I.F., Y.M., K.K., S.A.), Human Pathology (Y.F.), and Gastroenterology (K.I.), Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom (G.C., R.M.B., C.P.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.M.B., C.P.)
| | - Koji Kamagata
- From the Departments of Radiology (S.F., K.S., H.K., I.F., Y.M., K.K., S.A.), Human Pathology (Y.F.), and Gastroenterology (K.I.), Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom (G.C., R.M.B., C.P.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.M.B., C.P.)
| | - Osamu Abe
- From the Departments of Radiology (S.F., K.S., H.K., I.F., Y.M., K.K., S.A.), Human Pathology (Y.F.), and Gastroenterology (K.I.), Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom (G.C., R.M.B., C.P.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.M.B., C.P.)
| | - Kenichi Ikejima
- From the Departments of Radiology (S.F., K.S., H.K., I.F., Y.M., K.K., S.A.), Human Pathology (Y.F.), and Gastroenterology (K.I.), Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom (G.C., R.M.B., C.P.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.M.B., C.P.)
| | - René M Botnar
- From the Departments of Radiology (S.F., K.S., H.K., I.F., Y.M., K.K., S.A.), Human Pathology (Y.F.), and Gastroenterology (K.I.), Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom (G.C., R.M.B., C.P.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.M.B., C.P.)
| | - Claudia Prieto
- From the Departments of Radiology (S.F., K.S., H.K., I.F., Y.M., K.K., S.A.), Human Pathology (Y.F.), and Gastroenterology (K.I.), Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom (G.C., R.M.B., C.P.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.M.B., C.P.)
| | - Shigeki Aoki
- From the Departments of Radiology (S.F., K.S., H.K., I.F., Y.M., K.K., S.A.), Human Pathology (Y.F.), and Gastroenterology (K.I.), Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo, Tokyo 113-8421, Japan; Department of Radiology, University of Tokyo, Tokyo, Japan (S.F., Y.M., O.A.); Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom (G.C., R.M.B., C.P.); Department of MR Clinical Science, Philips Japan, Tokyo, Japan (M.Y.); School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile (R.M.B., C.P.)
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Nonaka H, Tahara M, Sanada K, Okano M, Morikawa Y, Yoshiura T, Nitta T, Urayama K, Yoneyama M, Imada N, Sato T. Non-contrast magnetic resonance angiography for systemic artery evaluation in Kawasaki disease. Pediatr Int 2023; 65:e15704. [PMID: 37991179 DOI: 10.1111/ped.15704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 09/24/2023] [Accepted: 10/12/2023] [Indexed: 11/23/2023]
Abstract
BACKGROUND Kawasaki disease (KD) is a systemic vasculitis; systemic arteries other than the coronary arteries should therefore also be evaluated. This study investigated the feasibility of evaluating coronary aneurysms, systemic artery aneurysms (SAAs), and cerebrovascular diseases in patients with KD using non-contrast magnetic resonance angiography (NC-MRA). METHODS Coronary artery protocols, including coronary magnetic resonance angiography (MRA) and vessel wall imaging, were performed in 57 examinations of 28 patients. Systemic artery protocol, including SAA scans and head MRA, along with coronary artery protocol, were performed in 42 examinations of 42 patients. The image quality of the SAAs was evaluated on a 4-point scale. Examination time and sedation dosage were compared between the protocols. The presence of SAAs and cerebrovascular disease was also evaluated. RESULTS The image quality score of SAAs was 4 (interquartile range [IQR]: 4-4) for the aorta, 4 (IQR: 3-4) for the subclavian artery, 4 (IQR: 3-4) for the renal artery, and 3 (IQR: 3-4) for the iliac artery. No differences were found between examination time (47.0 [IQR: 43.0-61.0] min vs. 51.0 [IQR: 45.0-60.0] min, p = 0.48) and sedative dose (4.63 [IQR: 3.93-5.79] mg/kg vs. 4.21 [IQR: 3.56-5.71] mg/kg, p = 0.37) between the protocols. Systemic artery protocol detected SAAs in three patients (7.1%), and cerebrovascular disease was not detected. CONCLUSIONS Evaluating the coronary and systemic arteries in patients with KD using NC-MRA on a single examination was possible without compromising examination time or sedation dose. The systemic artery protocol was useful in finding SAAs.
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Affiliation(s)
- Haruki Nonaka
- Department of Radiological Technology, Tsuchiya General Hospital, Hiroshima, Japan
| | - Masahiro Tahara
- Hiroshima central street Children's Clinic, Hiroshima, Japan
| | - Kazuya Sanada
- Department of Pediatric Cardiology, Shizuoka Children's Hospital, Shizuoka, Japan
| | - Mio Okano
- Department of Radiological Technology, Tsuchiya General Hospital, Hiroshima, Japan
| | - Yuko Morikawa
- Department of Radiological Technology, Tsuchiya General Hospital, Hiroshima, Japan
| | - Takayuki Yoshiura
- Department of Radiological Technology, Tsuchiya General Hospital, Hiroshima, Japan
| | | | - Kotaro Urayama
- Department of Pediatric Cardiology, Tsuchiya General Hospital, Hiroshima, Japan
| | | | - Naoyuki Imada
- Department of Health Care, North Hiroshima Hospital, Hiroshima, Japan
| | - Tomoyasu Sato
- Department of Diagnostic Radiology, Tsuchiya General Hospital, Hiroshima, Japan
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15
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Wada T, Togao O, Tokunaga C, Oga M, Kikuchi K, Yamashita K, Yamamoto H, Yoneyama M, Kobayashi K, Kato T, Ishigami K, Yabuuchi H. Grading of gliomas using 3D CEST imaging with compressed sensing and sensitivity encoding. Eur J Radiol 2023; 158:110654. [PMID: 36528957 DOI: 10.1016/j.ejrad.2022.110654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 12/02/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022]
Abstract
PURPOSE We evaluated the usefulness of three-dimensional (3D) chemical exchange saturation transfer (CEST) imaging with compressed sensing and sensitivity encoding (CS-SENSE) for differentiating low-grade gliomas (LGGs) from high-grade gliomas (HGGs). METHODS We evaluated 28 patients (mean age 51.0 ± 13.9 years, 13 males, 15 females) including 12 with LGGs and 16 with HGGs, all acquired using a 3 T magnetic resonance (MR) scanner. Nine slices were acquired for 3D CEST imaging, and one slice was acquired for two-dimensional (2D) CEST imaging. Two radiological technologists each drew a region of interest (ROI) surrounding the high-signal-intensity area(s) on the fluid-attenuated inversion recovery image of each patient. We compared the magnetization transfer ratio asymmetry (MTRasym) at 3.5 ppm in the tumors among the (i) single-slice 2D CEST imaging ("2D"), (ii) all tumor slices of the 3D CEST imaging (3Dall), and (iii) a representative tumor slice of 3D CEST imaging (maximum signal intensity [3Dmax]). The relationship between the MTRasym at 3.5 ppm values measured by these three methods and the Ki-67 labeling index (LI) of the tumors was assessed. Diagnostic performance was evaluated with a receiver operating characteristic analysis. The Ki-67LI and MTRasym at 3.5 ppm values were compared between the LGGs and HGGs. RESULTS A moderate positive correlation between the MTRasym at 3.5 ppm and the Ki-67LI was observed with all three methods. All methods proved a significantly larger MTRasym at 3.5 ppm for the HGGs compared to the LGGs. All methods showed equivalent diagnostic performance. The signal intensity varied depending on the slice position in each case. CONCLUSIONS The 3D CEST imaging provided the MTRasym at 3.5 ppm for each slice cross-section; its diagnostic performance was also equivalent to that of 2D CEST imaging.
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Affiliation(s)
- Tatsuhiro Wada
- Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Japan; Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, Japan.
| | - Osamu Togao
- Department of Molecular Imaging & Diagnosis, Graduate School of Medical Sciences, Kyushu University, Japan
| | - Chiaki Tokunaga
- Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Japan
| | - Masahiro Oga
- Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Japan
| | - Kazufumi Kikuchi
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Japan
| | - Koji Yamashita
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Japan
| | - Hidetaka Yamamoto
- Department of Anatomic Pathology, Pathological Sciences, Graduate School of Medical Sciences, Kyushu University, Japan
| | | | - Koji Kobayashi
- Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Japan
| | - Toyoyuki Kato
- Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Japan
| | - Kousei Ishigami
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Japan
| | - Hidetake Yabuuchi
- Department of Health Sciences, Faculty of Medical Sciences, Kyushu University, Japan
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16
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Yoshida N, Nakaura T, Morita K, Yoneyama M, Tanoue S, Yokota Y, Uetani H, Nagayama Y, Kidoh M, Azuma M, Hirai T. Echo planar imaging with compressed sensitivity encoding (EPICS): Usefulness for head and neck diffusion-weighted MRI. Eur J Radiol 2022; 155:110489. [PMID: 36037584 DOI: 10.1016/j.ejrad.2022.110489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Revised: 04/05/2022] [Accepted: 08/02/2022] [Indexed: 11/15/2022]
Abstract
PURPOSE To evaluate diffusion-weighted imaging (DWI) using echo planar imaging (EPI) with compressed SENSE (EPICS) of the head and neck magnetic resonance imaging (MRI). METHOD We retrospectively observed 32 patients who underwent head and neck DWI according to either the conventional method (SENSE, reduction factor = 2), fast scanning method (SENSE, reduction factor = 4), or fast scanning method with EPICS (EPICS, reduction factor = 4). For quantitative analysis, contrast-to-noise-ratio (CNR), apparent diffusion coefficient (ADC) values, geometric distortion, and coefficient of variations (CV) were measured and compared. For qualitative analysis, all images were independently and blindly evaluated by two board-certified radiologists. RESULTS EPICS revealed the higher CNR between all location compared to those of SENSE with reduction factor = 4. Distortion in the anterior-posterior direction was significantly lower on EPICS than on the conventional scan (p = 0.02). A comparison between the ADC values of the EPICS and conventional scan revealed no significant differences. The CV was significantly lower for EPICS than the conventional scan [DWI: 0.22 (IQR: 0.15-0.30) vs 0.32 (IQR: 0.24-0.40), p = 0.02]. CONCLUSIONS Compressed SENSE combined with the high acceleration factor can improve image quality, homogeneity, and distortion in the head and neck DWI maintaining ADC values and the scan time duration.
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Affiliation(s)
- Naofumi Yoshida
- Department of Diagnostic Radiology, Graduate School of Medical Sciences, Kumamoto University, Japan
| | - Takeshi Nakaura
- Department of Diagnostic Radiology, Graduate School of Medical Sciences, Kumamoto University, Japan.
| | - Kosuke Morita
- Department of Radiology, Kumamoto University Hospital, Japan
| | | | - Shota Tanoue
- Department of Diagnostic Radiology, Graduate School of Medical Sciences, Kumamoto University, Japan
| | - Yasuhiro Yokota
- Department of Diagnostic Radiology, Graduate School of Medical Sciences, Kumamoto University, Japan
| | - Hiroyuki Uetani
- Department of Diagnostic Radiology, Graduate School of Medical Sciences, Kumamoto University, Japan
| | - Yasunori Nagayama
- Department of Diagnostic Radiology, Graduate School of Medical Sciences, Kumamoto University, Japan
| | - Masafumi Kidoh
- Department of Diagnostic Radiology, Graduate School of Medical Sciences, Kumamoto University, Japan
| | - Minako Azuma
- Department of Radiology, Faculty of Medicine, University of Miyazaki, Japan
| | - Toshinori Hirai
- Department of Diagnostic Radiology, Graduate School of Medical Sciences, Kumamoto University, Japan
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17
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Tamada T, Ueda Y, Kido A, Yoneyama M, Takeuchi M, Sanai H, Ono K, Yamamoto A, Sone T. Clinical application of single-shot echo-planar diffusion-weighted imaging with compressed SENSE in prostate MRI at 3T: preliminary experience. MAGMA 2022; 35:549-556. [PMID: 35403993 DOI: 10.1007/s10334-022-01010-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 03/16/2022] [Accepted: 03/22/2022] [Indexed: 06/14/2023]
Abstract
OBJECTIVES Image quality (IQ) of diffusion-weighted imaging (DWI) with single-shot echo-planar imaging (ssEPI) suffers from low signal-to-noise ratio (SNR) in high b-value acquisitions. Compressed SENSE (C-SENSE), which combines SENSE with compressed sensing, enables SNR to be improved by reducing noise. The aim of this study was to compare IQ and prostate cancer (PC) detectability between DWI with ssEPI using SENSE (EPIS) and using C-SENSE (EPICS). MATERIALS AND METHODS Twenty-five patients with pathologically proven PC underwent multi-parametric magnetic resonance imaging at 3T. DW images acquired with EPIS and EPICS were assessed for the following: lesion conspicuity (LC), SNR, contrast-to-noise ratio (CNR), mean and standard deviation (SD) of apparent diffusion coefficient (ADC) of lesion (lADCm and lADCsd), coefficient of variation of lesion ADC (lADCcv), and mean ADC of benign prostate (bADCm). RESULTS LC were comparable between EPIS and EPICS (p > 0.050), and SNR and CNR were significantly higher in EPICS than EPIS (p = 0.001 and p < 0.001). In both EPIS and EPICS, lADCm was significantly lower than bADCm (p < 0.001). In addition, lADCcv was significantly lower in EPICS than in EPIS (p < 0.001). CONCLUSION Compared with EPIS, EPICS has improved IQ and comparable diagnostic performance in PC.
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Affiliation(s)
- Tsutomu Tamada
- Department of Radiology, Kawasaki Medical School, 577 Matsushima, Kurashiki-city, Okayama, 701-0192, Japan.
| | - Yu Ueda
- Philips Japan, Konan 2-13-37, Minato-ku, Tokyo, 108-8507, Japan
| | - Ayumu Kido
- Department of Radiology, Kawasaki Medical School, 577 Matsushima, Kurashiki-city, Okayama, 701-0192, Japan
| | - Masami Yoneyama
- Philips Japan, Konan 2-13-37, Minato-ku, Tokyo, 108-8507, Japan
| | - Mitsuru Takeuchi
- Department of Radiology, Radiolonet Tokai, Asaoka-cho 3-86-2, Chikusa-ku, Nagoya-city , Aichi, 464-0811, Japan
| | - Hiroyasu Sanai
- Department of Radiology, Kawasaki Medical School, 577 Matsushima, Kurashiki-city, Okayama, 701-0192, Japan
| | - Kentaro Ono
- Department of Radiology, Kawasaki Medical School, 577 Matsushima, Kurashiki-city, Okayama, 701-0192, Japan
| | - Akira Yamamoto
- Department of Radiology, Kawasaki Medical School, 577 Matsushima, Kurashiki-city, Okayama, 701-0192, Japan
| | - Teruki Sone
- Department of Radiology, Kawasaki Medical School, 577 Matsushima, Kurashiki-city, Okayama, 701-0192, Japan
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18
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Fujima N, Shimizu Y, Yoneyama M, Nakagawa J, Kameda H, Harada T, Hamada S, Suzuki T, Tsushima N, Kano S, Homma A, Kudo K. The utility of diffusion-weighted T2 mapping for the prediction of histological tumor grade in patients with head and neck squamous cell carcinoma. Quant Imaging Med Surg 2022; 12:4024-4032. [PMID: 35919040 PMCID: PMC9338371 DOI: 10.21037/qims-22-136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Accepted: 05/09/2022] [Indexed: 11/12/2022]
Abstract
Background In head and neck cancers, histopathological information is important for the determination of the tumor characteristics and for predicting the prognosis. The aim of this study was to assess the utility of diffusion-weighted T2 (DW-T2) mapping for the evaluation of tumor histological grade in patients with head and neck squamous cell carcinoma (SCC). Methods The cases of 41 patients with head and neck SCC (21 well/moderately and 17 poorly differentiated SCC) were retrospectively analyzed. All patients received MR scanning using a 3-Tesla MR unit. The conventional T2 value, DW-T2 value, ratio of DW-T2 value to conventional T2 value, and apparent diffusion coefficient (ADC) were calculated using signal information from the DW-T2 mapping sequence with a manually placed region of interest (ROI). Results ADC values in the poorly differentiated SCC group were significantly lower than those in the moderately/well differentiated SCC group (P<0.05). The ratio of DW-T2 value to conventional T2 value was also significantly different between poorly and moderately/well differentiated SCC groups (P<0.01). Receiver operating characteristic (ROC) curve analysis of ADC values showed a sensitivity of 0.76, specificity of 0.67, positive predictive value (PPV) of 0.62, negative predictive value (NPV) of 0.8, accuracy of 0.71 and area under the curve (AUC) of 0.73, whereas the ROC curve analysis of the ratio of DW-T2 value to conventional T2 value showed a sensitivity of 0.76, specificity of 0.83, PPV of 0.76, NPV of 0.83, accuracy of 0.8 and AUC of 0.82. Conclusions DW-T2 mapping might be useful as supportive information for the determination of tumor histological grade in patients with head and neck SCC.
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Affiliation(s)
- Noriyuki Fujima
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, Sapporo, Japan
| | - Yukie Shimizu
- Department of Diagnostic Imaging, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan.,Department of Advanced Diagnostic Imaging Development, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | | | - Junichi Nakagawa
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, Sapporo, Japan
| | - Hiroyuki Kameda
- Department of Diagnostic Imaging, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Taisuke Harada
- Department of Diagnostic Imaging, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Seijiro Hamada
- Department of Otolaryngology-Head and Neck Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Takayoshi Suzuki
- Department of Otolaryngology-Head and Neck Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Nayuta Tsushima
- Department of Otolaryngology-Head and Neck Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Satoshi Kano
- Department of Otolaryngology-Head and Neck Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Akihiro Homma
- Department of Otolaryngology-Head and Neck Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Kohsuke Kudo
- Department of Diagnostic Imaging, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan.,Department of Advanced Diagnostic Imaging Development, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan.,The Global Station for Quantum Medical Science and Engineering, Global Institution for Collaborative Research and Education, Sapporo, Japan
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19
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Bode M, Zhang S, Terwolbeck MN, Molavi Tabrizi C, Yoneyama M, Kraemer NA, Kuhl CK, Barabasch A. Liver diffusion-weighted MR imaging with L1-regularized iterative sensitivity encoding reconstruction based on single-shot echo-planar imaging: initial clinical experience. Sci Rep 2022; 12:12468. [PMID: 35864273 PMCID: PMC9304342 DOI: 10.1038/s41598-022-16324-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 07/08/2022] [Indexed: 11/09/2022] Open
Abstract
To investigate whether combining L1-regularized iterative sensitivity encoding (SENSE) reconstruction and single-shot echo planar imaging (EPI) is useful in hepatic DWI. Single-shot EPI-DWI with L1-regularized iterative SENSE reconstruction (L1-DWI) and conventional parallel imaging-based reconstruction (conv-DWI) in liver MRI were compared in volunteers and patients. For the patient cohort, 75 subjects (60 ± 13 years) with 349 focal liver lesions (FLL) were included. Patient groups A and B were used to reduce acquisition time or improve spatial resolution, respectively. Image parameters were rated on a 5-point scale. The number of FLLs was recorded; in case of discrepancy, the reason for non-detectability was analyzed. In volunteers, higher signal-to-noise ratio (24.4 ± 5.6 vs. 12.2 ± 2.3, p < 0.001 at b = 0; 19.3 ± 2.8 vs. 9.8 ± 1.6, p < 0.001 at b = 800) and lower standard deviation of the apparent diffusion coefficient-values (0.17 vs. 0.20 mm2/s, p < 0.05) were found on L1-DWI compared to conv-DWI. In patients, image ratings were similar for all parameters except for "conspicuity of FLLs" which was rated significantly lower on L1-DWI vs. conv-DWI (4.7 ± 0.6 vs. 4.2 ± 0.9, p < 0.05) in group A. In five patients, 11/349 FLLs were not detectable on L1-DWI, but on conv-DWI. L1-regularized iterative reconstruction of single-shot EPI DWI can accelerate image acquisition or improve spatial resolution. However, our finding that FLLs were non-detectable on L1-DWI warrants further research.
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Affiliation(s)
- Maike Bode
- Department of Diagnostic and Interventional Radiology, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074, Aachen, Germany.
| | - Shuo Zhang
- Department of Diagnostic and Interventional Radiology, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074, Aachen, Germany.,Philips Healthcare, Hamburg, Germany
| | - Mark N Terwolbeck
- Department of Diagnostic and Interventional Radiology, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074, Aachen, Germany
| | - Caroline Molavi Tabrizi
- Department of Diagnostic and Interventional Radiology, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074, Aachen, Germany
| | | | - Nils A Kraemer
- Department of Diagnostic and Interventional Radiology, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074, Aachen, Germany
| | - Christiane K Kuhl
- Department of Diagnostic and Interventional Radiology, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074, Aachen, Germany
| | - Alexandra Barabasch
- Department of Diagnostic and Interventional Radiology, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074, Aachen, Germany
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20
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Fujima N, Shimizu Y, Yoneyama M, Nakagawa J, Kameda H, Harada T, Hamada S, Suzuki T, Tsushima N, Kano S, Homma A, Kudo K. Amide proton transfer imaging for the determination of human papillomavirus status in patients with oropharyngeal squamous cell carcinoma. Medicine (Baltimore) 2022; 101:e29457. [PMID: 35839055 DOI: 10.1097/md.0000000000029457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
Abstract
The aim of this study was to investigate the utility of amide proton transfer (APT) imaging for the determination of human papillomavirus (HPV) status in patients with oropharyngeal squamous cell carcinoma (SCC). Thirty-one patients with oropharyngeal SCC were retrospectively evaluated. All patients underwent amide proton transfer imaging using a 3T magnetic resonance (MR) unit. Patients were divided into HPV-positive and -negative groups depending on the pathological findings in their primary tumor. In APT imaging, the primary tumor was delineated with a polygonal region of interest (ROI). Signal information in the ROI was used to calculate the mean, standard deviation (SD) and coefficient of variant (CV) of the APT signals (APT mean, APT SD, and APT CV, respectively). The value of APT CV in the HPV-positive group (0.43 ± 0.04) was significantly lower than that in the HPV-negative group (0.48 ± 0.04) (P = .01). There was no significant difference in APT mean (P = .82) or APT SD (P = .13) between the HPV-positive and -negative groups. Receiver operating characteristic (ROC) curve analysis of APT CV had a sensitivity of 0.75, specificity of 0.8, positive predictive value of 0.75, negative predictive value of 0.8, accuracy of 0.77 and area under the curve (AUC) of 0.8. The APT signal in the HPV-negative group was considered heterogeneous compared to the HPV-positive group. This information might be useful for the determination of HPV status in patients with oropharyngeal SCC.
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Affiliation(s)
- Noriyuki Fujima
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, Sapporo, Japan
| | - Yukie Shimizu
- Department of Diagnostic Imaging, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
- Department of Advanced Diagnostic Imaging Development, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | | | - Junichi Nakagawa
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, Sapporo, Japan
| | - Hiroyuki Kameda
- Department of Diagnostic Imaging, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Taisuke Harada
- Department of Diagnostic Imaging, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Seijiro Hamada
- Department of Otolaryngology-Head and Neck Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Takayoshi Suzuki
- Department of Otolaryngology-Head and Neck Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Nayuta Tsushima
- Department of Otolaryngology-Head and Neck Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Satoshi Kano
- Department of Otolaryngology-Head and Neck Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Akihiro Homma
- Department of Otolaryngology-Head and Neck Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Kohsuke Kudo
- Department of Diagnostic Imaging, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
- Department of Advanced Diagnostic Imaging Development, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
- The Global Station for Quantum Medical Science and Engineering, Global Institution for Collaborative Research and Education, Sapporo, Japan
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21
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Nonaka H, Masuda T, Yoneyama M, Tahara M, Okano M, Morikawa Y, Sanada K, Sato T. Pitfall for systemic artery aneurysms evaluation using electrocardiogram-gated subtracted three-dimensional fast spin echo sequence of magnetic resonance imaging in patients with Kawasaki disease. Radiol Case Rep 2022; 17:1440-1444. [PMID: 35265237 PMCID: PMC8899111 DOI: 10.1016/j.radcr.2022.01.083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 01/24/2022] [Accepted: 01/25/2022] [Indexed: 11/26/2022] Open
Abstract
Kawasaki disease (KD) is described as a syndrome that causes both coronary and systemic artery aneurysms (SAAs). This report describes the pitfall for SAAs’ evaluation when using electrocardiogram (ECG)-gated subtracted three-dimensional fast spin echo (3D FSE) sequence of magnetic resonance imaging in KD patients. A 12-year-old male was diagnosed with KD at 3 months of age. We acquired ECG-gated 3D FSE images in the diastole and systole phases with coronal sections. Subtraction was then performed from diastolic phase imaging to systolic phase imaging. A 15.5 mm right axillary artery aneurysm and an 8.0 mm left axillary artery aneurysm were identified with ECG-gated 3D FSE in the diastolic phase. However, we observed signal loss in the right axillary artery aneurysm when subtraction was performed to selectively detect arteries; further, the brachial artery was poorly detected. ECG-gated subtracted 3D FSE sequence of magnetic resonance imaging can compromise the image quality of both aneurysm and peripheral artery images when detecting SAAs.
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22
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Niitsu M, Saruya S, Sakaguchi K, Watarai K, Yoneyama M, Katsumata Y, Inoue K, Kozawa E. Motion-robust MR imaging of the shoulder using compressed SENSE MultiVane. Eur J Radiol Open 2022; 9:100450. [PMID: 36386762 PMCID: PMC9643403 DOI: 10.1016/j.ejro.2022.100450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 10/20/2022] [Accepted: 11/01/2022] [Indexed: 11/08/2022] Open
Abstract
Purpose Motion artifacts caused by breathing or involuntary motion of patients, which may lead to reduced image quality and a loss of diagnostic information, are a major problem in shoulder magnetic resonance imaging (MRI). The MultiVane (MV) technique decreases motion artifacts; however, it tends to prolong the acquisition time. As a parallel imaging technique, SENSitivity Encoding (SENSE) can be combined with the compressed sensing method to produce compressed SENSE (C-SENSE), resulting in a markedly reduced acquisition time. This study aimed to evaluate the use of C-SENSE MV for MRI of the shoulder joint. Methods Thirty-one patients who were scheduled to undergo MRI of the shoulder were included. This prospective study was approved by our institution’s medical ethics committee, and written informed consent was obtained from all 31 patients. Two sets of oblique coronal images derived from the standard protocol were acquired without (standard) or with C-SENSE MV: proton-density weighted imaging (PDWI), PDWI with C-SENSE MV, T2-weighted imaging (T2WI) with fat suppression (fs), and T2WI fs with C-SENSE MV. Two radiologists graded motion artifacts and the detectability of anatomical shoulder structures on a 4-point scale (3, no artifacts/excellent delineation; 0, severe artifacts/difficulty with delineation). The Wilcoxon signed-rank test was used to compare the data for the standard and C-SENSE MV images. Results Motion artifacts were significantly reduced on the C-SENSE MV images (p < 0.001). Regarding the detectability of anatomical structures, the ratings for the C-SENSE MV sequences were significantly better (p < 0.001). In conclusion, in shoulder MRI the newly developed C-SENSE MV technique reduces motion artifacts and increases the detectability of anatomical structures compared with standard sequences. Compressed SENSE (C-SENSE), an acceleration technique that combines compressed sensing with SENSE, is described. Combining C-SENSE with MultiVane increases motion robustness and achieves comparable scan times to Cartesian scans. C-SENSE MultiVane maintains image quality and is useful for MRI of the shoulder joint.
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Aoike T, Fujima N, Yoneyama M, Fujiwara T, Takamori S, Aoike S, Ishizaka K, Kudo K. Development of three-dimensional MR neurography using an optimized combination of compressed sensing and parallel imaging. Magn Reson Imaging 2021; 87:32-37. [PMID: 34968698 DOI: 10.1016/j.mri.2021.12.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 11/18/2021] [Accepted: 12/22/2021] [Indexed: 10/19/2022]
Abstract
PURPOSE To assess the cervical magnetic resonance neurography (MRN) imaging quality obtained with compressed sensing and sensitivity-encoding (compressed SENSE; CS-SENSE) technique in comparison to that obtained with the conventional parallel imaging (i.e., SENSE) technique. MATERIALS AND METHODS Five healthy volunteers underwent a three-dimensional (3D) turbo spin-echo (TSE)-based cervical MRN examination using a 3.0 Tesla MR-unit. All MRN acquisitions were performed with CS-SENSE and conventional SENSE. We used four acceleration factors (4, 8, 16 and 32) in CS-SENSE. The image quality in MRN was evaluated by assessing the degree of cervical nerve depiction using the contrast ratio (CR) and contrast-noise ratio (CNR) between the cervical nerve and the background signal intensity and a visual scoring system (1: poor, 2: moderate, 3: good). In all of the CR, CNR and visual score, we calculated the ratio of the CS-SENSE-based MRN to that from SENSE-based MRN plus the 95% confidence intervals (CIs) of these ratios. RESULTS In the multiple comparison of MRN images with the control of conventional SENSE-based MRN, both the quantitative CR values and the visual score for the CS-SENSE factors of 16 and 32 were significantly lower, whereas the CS-SENSE factors of 4 and 8 showed a non-significant difference. In addition, the quantitative CNR values obtained with the CS-SENSE factors of 4 and 8 were significantly higher than that obtained with the conventional SENSE-based MRN while the CS-SENSE factor of 32 was significantly lower, in contrast, the CS-SENSE factors of 16 showed a non-significant difference. For CS-SENSE factors of 4 and 8, all ratios of the CS-SENSE-based MRN values for CR, CNR and visual scores to those from SENSE-based MRN were above 0.95. CONCLUSION CS-SENSE-based MRN can accomplish fast scanning with sufficient image quality when using a high acceleration factor.
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Affiliation(s)
- Takuya Aoike
- Department of Radiological Technology, Hokkaido University Hospital, Sapporo, Japan
| | - Noriyuki Fujima
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, Sapporo, Japan.
| | | | - Taro Fujiwara
- Department of Radiological Technology, Hokkaido University Hospital, Sapporo, Japan
| | - Sayaka Takamori
- Department of Radiological Technology, Hokkaido University Hospital, Sapporo, Japan
| | - Suzuko Aoike
- Department of Radiological Technology, Hokkaido University Hospital, Sapporo, Japan
| | - Kinya Ishizaka
- Department of Radiological Technology, Hokkaido University Hospital, Sapporo, Japan
| | - Kohsuke Kudo
- Department of Diagnostic Imaging, Hokkaido University Graduate School of Medicine, Sapporo, Japan; Global Center for Biomedical Science and Engineering, Faculty of Medicine, Hokkaido University, Sapporo, Japan
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24
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Boonsuth R, Samson RS, Tur C, Battiston M, Grussu F, Schneider T, Yoneyama M, Prados F, Ttofalla A, Collorone S, Cortese R, Ciccarelli O, Gandini Wheeler-Kingshott CAM, Yiannakas MC. Assessing Lumbar Plexus and Sciatic Nerve Damage in Relapsing-Remitting Multiple Sclerosis Using Magnetisation Transfer Ratio. Front Neurol 2021; 12:763143. [PMID: 34899579 PMCID: PMC8654928 DOI: 10.3389/fneur.2021.763143] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 10/21/2021] [Indexed: 12/21/2022] Open
Abstract
Background: Multiple sclerosis (MS) has traditionally been regarded as a disease confined to the central nervous system (CNS). However, neuropathological, electrophysiological, and imaging studies have demonstrated that the peripheral nervous system (PNS) is also involved, with demyelination and, to a lesser extent, axonal degeneration representing the main pathophysiological mechanisms. Aim: The purpose of this study was to assess PNS damage at the lumbar plexus and sciatic nerve anatomical locations in people with relapsing-remitting MS (RRMS) and healthy controls (HCs) in vivo using magnetisation transfer ratio (MTR), which is a known imaging biomarker sensitive to alterations in myelin content in neural tissue, and not previously explored in the context of PNS damage in MS. Method: Eleven HCs (7 female, mean age 33.6 years, range 24-50) and 15 people with RRMS (12 female, mean age 38.5 years, range 30-56) were recruited for this study and underwent magnetic resonance imaging (MRI) investigations together with clinical assessments using the expanded disability status scale (EDSS). Magnetic resonance neurography (MRN) was first used for visualisation and identification of the lumbar plexus and the sciatic nerve and MTR imaging was subsequently performed using identical scan geometry to MRN, enabling straightforward co-registration of all data to obtain global and regional mean MTR measurements. Linear regression models were used to identify differences in MTR values between HCs and people with RRMS and to identify an association between MTR measures and EDSS. Results: MTR values in the sciatic nerve of people with RRMS were found to be significantly lower compared to HCs, but no significant MTR changes were identified in the lumbar plexus of people with RRMS. The median EDSS in people with RRMS was 2.0 (range, 0-3). No relationship between the MTR measures in the PNS and EDSS were identified at any of the anatomical locations studied in this cohort of people with RRMS. Conclusion: The results from this study demonstrate the presence of PNS damage in people with RRMS and support the notion that these changes, suggestive of demyelination, maybe occurring independently at different anatomical locations within the PNS. Further investigations to confirm these findings and to clarify the pathophysiological basis of these alterations are warranted.
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Affiliation(s)
- Ratthaporn Boonsuth
- Nuclear Magnetic Resonance Research Unit, Queen Square MS Centre, Department of Neuroinflammation, University College London Queen Square Institute of Neurology, University College London, London, United Kingdom
| | - Rebecca S. Samson
- Nuclear Magnetic Resonance Research Unit, Queen Square MS Centre, Department of Neuroinflammation, University College London Queen Square Institute of Neurology, University College London, London, United Kingdom
| | - Carmen Tur
- Nuclear Magnetic Resonance Research Unit, Queen Square MS Centre, Department of Neuroinflammation, University College London Queen Square Institute of Neurology, University College London, London, United Kingdom
- Multiple Sclerosis Centre of Catalonia (Cemcat), Vall d'Hebron Institute of Research, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - Marco Battiston
- Nuclear Magnetic Resonance Research Unit, Queen Square MS Centre, Department of Neuroinflammation, University College London Queen Square Institute of Neurology, University College London, London, United Kingdom
| | - Francesco Grussu
- Nuclear Magnetic Resonance Research Unit, Queen Square MS Centre, Department of Neuroinflammation, University College London Queen Square Institute of Neurology, University College London, London, United Kingdom
- Radiomics Group, Vall d'Hebron Institute of Oncology, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
- Centre for Medical Image Computing, Department of Computer Science, University College London, London, United Kingdom
| | | | | | - Ferran Prados
- Nuclear Magnetic Resonance Research Unit, Queen Square MS Centre, Department of Neuroinflammation, University College London Queen Square Institute of Neurology, University College London, London, United Kingdom
- Department of Medical Physics and Biomedical Engineering, Centre for Medical Image Computing, University College London, London, United Kingdom
- E-Health Center, Universitat Oberta de Catalunya, Barcelona, Spain
| | - Antrea Ttofalla
- Nuclear Magnetic Resonance Research Unit, Queen Square MS Centre, Department of Neuroinflammation, University College London Queen Square Institute of Neurology, University College London, London, United Kingdom
| | - Sara Collorone
- Nuclear Magnetic Resonance Research Unit, Queen Square MS Centre, Department of Neuroinflammation, University College London Queen Square Institute of Neurology, University College London, London, United Kingdom
| | - Rosa Cortese
- Nuclear Magnetic Resonance Research Unit, Queen Square MS Centre, Department of Neuroinflammation, University College London Queen Square Institute of Neurology, University College London, London, United Kingdom
| | - Olga Ciccarelli
- Nuclear Magnetic Resonance Research Unit, Queen Square MS Centre, Department of Neuroinflammation, University College London Queen Square Institute of Neurology, University College London, London, United Kingdom
| | - Claudia A. M. Gandini Wheeler-Kingshott
- Nuclear Magnetic Resonance Research Unit, Queen Square MS Centre, Department of Neuroinflammation, University College London Queen Square Institute of Neurology, University College London, London, United Kingdom
- Department of Brain and Behavioural Sciences, University of Pavia, Pavia, Italy
- Brain Connectivity Research Centre, Istituto di Ricovero e Cura a Carattere Scientifico Mondino Foundation, Pavia, Italy
| | - Marios C. Yiannakas
- Nuclear Magnetic Resonance Research Unit, Queen Square MS Centre, Department of Neuroinflammation, University College London Queen Square Institute of Neurology, University College London, London, United Kingdom
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Murayama D, Sakai T, Yoneyama M, Nose K, Hatakeyama H, Watanabe K, Ochi S. [Imaging Parameter Optimization of 3D Radial Stack-of-stars MRA with FID Sampling after Treatment of Cerebral Aneurysms with Metallic Devices]. Nihon Hoshasen Gijutsu Gakkai Zasshi 2021; 77:572-580. [PMID: 34148899 DOI: 10.6009/jjrt.2021_jsrt_77.6.572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Magnetic resonance angiography (MRA) using ultra-short TE (uTE) is known to be used for the evaluation of cerebral aneurysm after treatment such as clipping and coiling. However, conventional uTE sequences are not appropriate as an additional imaging sequence for 3D time-of-flight (TOF)-MRA because it is not possible to shorten scan time and acquire selective-volume imaging. To solve the problem, we focused on the combination of uTE sampling and 3D radial scan sequences. In this study, we examined the optimal imaging parameters of the proposed uTE-MRA. A simulated blood flow phantom with stents (Enterprise) and titanium clips (YASARGIL) was used for optimizing the TR, flip angle (FA), and radial percentage. The signal intensity in the simulated vessel was measured in each imaging condition, and the ratio of the presence or absence of a stent was evaluated as a relative in-stent signal (RIS). In addition, the diameter of the signal loss of the simulated artery was measured for each imaging condition, and signal loss length (SLL) of a clip was calculated from the average value. The RIS improved with increasing the FA and shortening the TR, but it did not change by changing the radial percentage. The SLL became smaller at the coil as the FA increased, but there was no significant difference between the intersection and the blade. There was also no significant difference between TR and radial percentage. The effective imaging conditions for uTE-MRA to improve the vascular description of the evaluation after treatment of cerebral aneurysms with metallic devices were those with large FA and short TR.
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Affiliation(s)
| | - Takayuki Sakai
- Department of Radiology, Eastern Chiba Medical Center.,Division of Health Sciences, Graduate School of Medical Sciences, Kanazawa University
| | | | - Kiichi Nose
- Department of Radiology, Eastern Chiba Medical Center
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26
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Anan G, Yoneyama T, Noro D, Tobisawa Y, Hatakeyama S, Yoneyama M, Yamamoto H, Yoneyama T, Hashimoto Y, Sato M, Ohyama C. Identification of aberrant glycosylation of osteopontin on urinary stone formation. Eur Urol 2021. [DOI: 10.1016/s0302-2838(21)00614-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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27
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Enomoto K, Eguchi Y, Sato T, Norimoto M, Inoue M, Watanabe A, Sakai T, Yoneyama M, Aoki Y, Orita S, Narita M, Inage K, Shiga Y, Umimura T, Sato M, Suzuki M, Takaoka H, Mizuki N, Kim G, Hozumi T, Hirosawa N, Furuya T, Maki S, Nakamura J, Hagiwara S, Koda M, Akazawa T, Takahashi H, Takahashi K, Ohtori S. Usefulness of Simultaneous Magnetic Resonance Neurography and Apparent T2 Mapping for the Diagnosis of Cervical Radiculopathy. Asian Spine J 2021; 16:47-55. [PMID: 34000796 PMCID: PMC8873997 DOI: 10.31616/asj.2020.0668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Accepted: 03/18/2021] [Indexed: 11/23/2022] Open
Abstract
Study Design Retrospective observational study. Purpose We investigated the correlation between T2 relaxation times and clinical symptoms in patients with cervical radiculopathy caused by cervical disk herniation. Overview of Literature There are currently no imaging modalities that can assess the affected cervical nerve roots quantitatively. Methods A total of 14 patients with unilateral radicular symptoms and five healthy subjects were subjected to simultaneous apparent T2 mapping and neurography with nerve-sheath signal increased with inked rest-tissue rapid acquisition of relaxation enhancement signaling (SHINKEI-Quant) using a 3-Tesla magnetic resonance imaging. The Visual Analog Scale (VAS) score for neck pain and upper arm pain was used to evaluate clinical symptoms. T2 relaxation times of the cervical dorsal root ganglia of the brachial plexus were measured bilaterally from C4 to C8 in patients with radicular symptoms and from C5 to C8 in healthy controls. The T2 ratio was calculated as the affected side to unaffected side. Results When comparing nerve roots bilaterally at each spinal level, no significant differences in T2 relaxation times were found between patients and healthy subjects. However, T2 relaxation times of nerve roots in the patients with unilateral radicular symptoms were significantly prolonged on the involved side compared with the uninvolved side (p<0.05). The VAS score for upper arm pain was not significantly correlated with the T2 relaxation times, but was positively correlated with the T2 ratio. Conclusions In patients with cervical radiculopathy, the SHINKEI-Quant technique can be used to quantitatively evaluate the compressed cervical nerve roots. The VAS score for upper arm pain was positively correlated with the T2 ratio. This suggests that the SHINKEI-Quant is a potential tool for the diagnosis of cervical nerve entrapment.
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Affiliation(s)
- Keigo Enomoto
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Yawara Eguchi
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan.,Department of Orthopaedic Surgery, Shimoshizu National Hospital, Yotsukaido, Japan
| | - Takashi Sato
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Masaki Norimoto
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Masahiro Inoue
- Department of Orthopaedic Surgery, Eastern Chiba Medical Center, Togane, Japan
| | - Atsuya Watanabe
- Department of Orthopaedic Surgery, Eastern Chiba Medical Center, Togane, Japan
| | - Takayuki Sakai
- Department of Radiology, Eastern Chiba Medical Center, Togane, Japan.,Faculty of Health Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | | | - Yasuchika Aoki
- Department of Orthopaedic Surgery, Eastern Chiba Medical Center, Togane, Japan
| | - Sumihisa Orita
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Miyako Narita
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Kazuhide Inage
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Yasuhiro Shiga
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Tomotaka Umimura
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Masashi Sato
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Masahiro Suzuki
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Hiromitsu Takaoka
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Norichika Mizuki
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Geundong Kim
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Takashi Hozumi
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Naoya Hirosawa
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Takeo Furuya
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Satoshi Maki
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Junichi Nakamura
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Shigeo Hagiwara
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Masao Koda
- Department of Orthopedic Surgery, University of Tsukuba, Tsukuba, Japan
| | - Tsutomu Akazawa
- Department of Orthopaedic Surgery, St. Marianna University School of Medicine, Kawasaki, Japan
| | - Hiroshi Takahashi
- Department of Orthopedic Surgery, University of Tsukuba, Tsukuba, Japan
| | - Kazuhisa Takahashi
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Seiji Ohtori
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
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28
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Tha KK, Kikuchi Y, Ishizaka K, Kamiyama T, Yoneyama M, Katscher U. Higher Electrical Conductivity of Liver Parenchyma in Fibrotic Patients: Noninvasive Assessment by Electric Properties Tomography. J Magn Reson Imaging 2021; 54:1689-1691. [PMID: 33998080 DOI: 10.1002/jmri.27701] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 05/06/2021] [Accepted: 05/07/2021] [Indexed: 12/25/2022] Open
Affiliation(s)
- Khin Khin Tha
- Global Center for Biomedical Science and Engineering, Faculty of Medicine, Hokkaido University, Sapporo, Japan.,Department of Diagnostic Imaging, Faculty of Medicine, Hokkaido University, Sapporo, Japan
| | - Yasuka Kikuchi
- Department of Diagnostic Imaging, Faculty of Medicine, Hokkaido University, Sapporo, Japan
| | - Kinya Ishizaka
- Department of Radiological Technology, Hokkaido University Hospital, Sapporo, Japan
| | - Toshiya Kamiyama
- Department of Gastroenterological Surgery, Faculty of Medicine, Hokkaido University, Sapporo, Japan
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Takayama Y, Nishie A, Okamoto D, Fujita N, Asayama Y, Ushijima Y, Yoshizumi T, Yoneyama M, Ishigami K. Differentiating Liver Hemangioma from Metastatic Tumor Using T2-enhanced Spin-echo Imaging with a Time-reversed Gradient-echo Sequence in the Hepatobiliary Phase of Gadoxetic Acid-enhanced MR Imaging. Magn Reson Med Sci 2021; 21:445-457. [PMID: 33883364 PMCID: PMC9316131 DOI: 10.2463/mrms.mp.2020-0151] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Purpose: To evaluate the utility of T2-enhanced spin-echo imaging using the time-reversed gradient echo sequence (T2FFE imaging) in the hepatobiliary phase (HBP) of gadoxetic acid-enhanced MRI (Gd-EOB-MRI) for differentiating hemangiomas from metastatic tumors. Methods: A total of 61 patients with 133 liver lesions, including 37 hemangiomas and 96 metastatic tumors, were scanned by Gd-EOB-MRI. Four data sets were independently analyzed by two readers: (1) 3D fat-suppressed T2-weighted imaging (FS-T2WI) alone; (2) the combination of 3D FS-T2WI and T2FFE imaging in the HBP of Gd-EOB-MRI; (3) the combination of 3D FS-T2WI, diffusion-weighted imaging (DWI) with the b-value of 1000 s/mm2 and the apparent diffusion coefficient (ADC); and (4) a dynamic study of Gd-EOB-MRI. After classifying the lesion sizes as ≤ 10 mm or > 10 mm, we conducted a receiver-operating characteristic analysis to compare diagnostic accuracies among the four data sets for differentiating hemangiomas from metastatic tumors. Results: The areas under the curves (AUCs) of the four data sets of two readers were: (1) ≤ 10 mm (0.85 and 0.91) and > 10 mm (0.88 and 0.97), (2) ≤ 10 mm (0.94 and 0.94) and > 10 mm (0.96 and 0.95), (3) ≤ 10 mm (0.90 and 0.87) and > 10 mm (0.89 and 0.95), and (4) ≤ 10 mm (0.62 and 0.67) and > 10 mm (0.76 and 0.71), respectively. Data sets (2) and (3) showed no significant differences in AUCs, but both showed significantly higher AUCs compared to that of (4) regardless of the lesion size (P < 0.05). Conclusion: The combination of 3D FS-T2WI and T2FFE imaging in the HBP of Gd-EOB-MRI achieved an accuracy equivalent to that of the combination of 3D FS-T2WI, DWI, and ADC and might be helpful in differentiating hemangiomas from metastatic tumors.
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Affiliation(s)
- Yukihisa Takayama
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University
| | - Akihiro Nishie
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University
| | - Daisuke Okamoto
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University
| | - Nobuhiro Fujita
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University
| | - Yoshiki Asayama
- Department of Advanced Imaging and Interventional Radiology, Graduate School of Medical Sciences, Kyushu University
| | - Yasuhiro Ushijima
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University
| | - Tomoharu Yoshizumi
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University
| | | | - Kousei Ishigami
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University
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30
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Azuma M, Khant ZA, Yoneyama M, Ikushima I, Hamanaka H, Yokogami K, Chosa E, Takeshima H, Hirai T. Evaluation of cervical ossification of the posterior longitudinal ligament with 3D broadband IR-prepared ultrashort echo-time imaging: a pilot study. Jpn J Radiol 2021; 39:487-493. [PMID: 33462729 DOI: 10.1007/s11604-020-01081-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 12/07/2020] [Indexed: 10/22/2022]
Abstract
PURPOSE We aimed to evaluate the feasibility of 3D broadband inversion-recovery-prepared ultrashort echo-time (3D IRP UTE) imaging for assessing ossification of the posterior longitudinal ligament (OPLL). MATERIALS AND METHODS The study consisted of 25 consecutive patients with cervical OPLL [13 women, 12 men; mean age 66.3 (47-84) years] who underwent CT, 3T conventional MR, and 3D IRP UTE imaging studies. Two readers independently assessed the 3D IRP UTE images for the type (mixed, continuous, circumscribed, segmental) and distribution of OPLL. All readers consensually assessed the diagnostic certainty of OPLL on conventional MR and 3D IRP UTE images by using a 3-point scale system. Interobserver and intermodality agreement was assessed by κ statistics. A Wilcoxon signed-rank test was used to evaluate the difference of diagnostic certainty between conventional MR and 3D IRP UTE imaging. RESULTS Interobserver and intermodality agreements were good (κ = 0.73) and excellent (κ = 0.81) for the OPLL type, and excellent (κ = 0.85) and good (κ = 0.76) for the assessment of the distribution of OPLL, respectively. The mean level of the diagnostic certainty of OPLL was significantly higher for 3D IRP UTE than conventional MR imaging (p = 0.002). CONCLUSION 3D IRP UTE imaging may be useful for assessing OPLL.
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Affiliation(s)
- Minako Azuma
- Department of Radiology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan.
| | - Zaw Aung Khant
- Department of Radiology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan
| | | | | | - Hideaki Hamanaka
- Departments of Orthopaedic Surgery, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Kiyotaka Yokogami
- Departments of Neurosurgery, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Etsuo Chosa
- Departments of Orthopaedic Surgery, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Hideo Takeshima
- Departments of Neurosurgery, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Toshinori Hirai
- Departments of Radiology, Kumamoto University, Kumamoto, Japan
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Nonaka H, Masuda T, Nakaura T, Tahara M, Nitta T, Yoneyama M, Okano M, Morikawa Y, Sato T. Evaluating for systemic artery aneurysms using noncontrast magnetic resonance angiography in patients with Kawasaki disease: A report of two cases. Radiol Case Rep 2021; 16:621-627. [PMID: 33425086 PMCID: PMC7785888 DOI: 10.1016/j.radcr.2020.12.062] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 12/23/2020] [Accepted: 12/25/2020] [Indexed: 12/17/2022] Open
Abstract
Kawasaki disease (KD) involves coronary aneurysms and can infrequently cause systemic artery aneurysms (SAAs). Therefore, patients with KD should be evaluated for both coronary and systemic arterial aneurysms. This report describes 2 cases of SAA evaluated using the diastolic phase image of electrocardiogram-gated three-dimensional fast spin echo during noncontrast magnetic resonance angiography. The first case was a 1-year-old male who diagnosed with KD at 2 months of age. Multiple right axillary artery aneurysms measuring 6.0 mm and 2.5 mm and left axillary artery aneurysms measuring 12.0 mm, 4.0 mm, and 3.0 mm were observed by scanning for 94 seconds. The second case was a 13-year-old male who diagnosed with KD at 4 months of age, with a 7.0-mm right axillary artery aneurysm observed by scanning for 101 seconds. Electrocardiogram-gated three-dimensional fast spin echo in the diastolic phase can help evaluate SAA in patients with KD and does not require a prolonged scanning time or contrast medium.
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Affiliation(s)
- Haruki Nonaka
- Department of Radiological Technology, Tsuchiya General Hospital, Nakajima-cho 3-30, Naka-ku, Hiroshima 730-8655, Japan
| | - Takanori Masuda
- Department of Radiological Technology, Tsuchiya General Hospital, Nakajima-cho 3-30, Naka-ku, Hiroshima 730-8655, Japan
| | - Takeshi Nakaura
- Department of Diagnostic Radiology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860-8556, Japan
| | - Masahiro Tahara
- Department of Pediatric Cardiology, Tsuchiya General Hospital, Nakajima-cho 3-30, Naka-ku, Hiroshima 730-8655, Japan
| | - Tetsuya Nitta
- Nitta Pediatric Clinic, Yokogawa-cho 3-9-14, Nishi-ku, Hiroshima 733-0011, Japan
| | - Masami Yoneyama
- Philips Japan, 2-13-37 Konan, Minato-ku, Tokyo 108-8507, Japan
| | - Mio Okano
- Department of Radiological Technology, Tsuchiya General Hospital, Nakajima-cho 3-30, Naka-ku, Hiroshima 730-8655, Japan
| | - Yuko Morikawa
- Department of Radiological Technology, Tsuchiya General Hospital, Nakajima-cho 3-30, Naka-ku, Hiroshima 730-8655, Japan
| | - Tomoyasu Sato
- Department of Diagnostic Radiology, Tsuchiya General Hospital, Nakajima-cho 3-30, Naka-ku, Hiroshima 730-8655, Japan
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Murata S, Hagiwara A, Fujita S, Haruyama T, Kato S, Andica C, Kamagata K, Goto M, Hori M, Yoneyama M, Hamasaki N, Hoshito H, Aoki S. Effect of hybrid of compressed sensing and parallel imaging on the quantitative values measured by 3D quantitative synthetic MRI: A phantom study. Magn Reson Imaging 2021; 78:90-97. [PMID: 33444595 DOI: 10.1016/j.mri.2021.01.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 12/08/2020] [Accepted: 01/08/2021] [Indexed: 02/03/2023]
Abstract
INTRODUCTION Recently, three-dimensional (3D) quantitative synthetic magnetic resonance imaging (MRI), which quantifies tissue properties and creates multiple contrast-weighted images, has been enabled by 3D-quantification using an interleaved Look-Locker acquisition sequence with a T2 preparation pulse (3D-QALAS). However, the relatively long scan time has hindered its introduction into clinical practice. A hybrid of compressed sensing and parallel imaging (Compressed sensing-sensitivity encoding: CS-SENSE) can accelerate 3D-QALAS; however, whether CS-SENSE affects the quantitative values acquired by 3D-QALAS remains unexplored. Therefore, this study aimed to examine the effects of reduction factors of CS-SENSE (RCSS) on the quantitative values derived from 3D-QALAS, by assessing the signal-to-noise ratio (SNR) of the quantitative maps, as well as accuracy (linearity and bias) and repeatability of measured quantitative values. METHODS In this study, the ISMRM/NIST standardized phantom was scanned on a 1.5-T MRI scanner with 3D-QALAS using RCSS in the range between 1 and 3, with intervals of 0.2, and between 3 and 10 with intervals of 0.5. The T1, T2, and proton density (PD) values were calculated from the imaging data. For each quantitative value, the SNR, the coefficient of determination (R2) of a linear regression model, the error rate, and the within-subject coefficient of variation (wCV) were calculated for each RCSS and compared. RESULTS Within the clinically-relevant dynamic range of the brain of T1 and T2 (T1: 200-1400 ms; T2; 50-400 ms) and PD value of 15-100% calculated from 3D-QALAS, the effects of RCSS on quantitative values was small between 1 and 2.8, with SNR ≧ 10, R2 ≧ 0.9, error rate ≦ 10%, and wCV ≦ 10%, except for T2 values of 186.1 and 258.4 ms. CONCLUSIONS CS-SENSE enabled the reduction of the scan time of 3D-QALAS by 63.5% (RCSS = 2.8) while maintaining the SNR of quantitative maps and accuracy and repeatability of the quantitative values.
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Affiliation(s)
- Syo Murata
- Department of Radiology, Juntendo University Hospital, Tokyo, Japan
| | - Akifumi Hagiwara
- Department of Radiology, Juntendo University Hospital, Tokyo, Japan.
| | - Shohei Fujita
- Department of Radiology, Juntendo University Hospital, Tokyo, Japan; Department of Radiology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Takuya Haruyama
- Department of Radiology, Juntendo University Hospital, Tokyo, Japan
| | - Shimpei Kato
- Department of Radiology, Juntendo University Hospital, Tokyo, Japan; Department of Radiology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Christina Andica
- Department of Radiology, Juntendo University Hospital, Tokyo, Japan
| | - Koji Kamagata
- Department of Radiology, Juntendo University Hospital, Tokyo, Japan
| | - Masami Goto
- Department of Radiological Technology, Faculty of Health Science, Juntendo University, Tokyo, Japan
| | - Masaaki Hori
- Department of Radiology, Juntendo University Hospital, Tokyo, Japan; Department of Radiology, Toho University Omori Medical Center, Tokyo, Japan
| | | | - Nozomi Hamasaki
- Department of Radiology, Juntendo University Hospital, Tokyo, Japan
| | | | - Shigeki Aoki
- Department of Radiology, Juntendo University Hospital, Tokyo, Japan
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Kubota Y, Yokota H, Sakai T, Yoneyama M, Ohira K, Uno T. Clinical feasibility of single-shot fluid-attenuated inversion recovery with wide inversion recovery pulse designed to reduce cerebrospinal fluid and motion artifacts for evaluation of uncooperative patients in acute stroke protocol. J Magn Reson Imaging 2020; 53:1833-1838. [PMID: 33368729 DOI: 10.1002/jmri.27483] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 12/08/2020] [Accepted: 12/10/2020] [Indexed: 11/06/2022] Open
Abstract
Fluid-attenuated inversion recovery (FLAIR) imaging is a key sequence for stroke assessment. Motion artifact reduction with short acquisition time is still challenging, but necessary in the magnetic resonance (MR) stroke protocol, especially for uncooperative patients suspected of stroke. The aim of this study is to investigate the feasibility of modified single-shot FLAIR with wide inversion recovery pulses for use in stroke patients. This is a prospective study, which included 30 patients clinically suspected of stroke who were examined by MR stroke protocol from January 2018 to September 2018. A 1.5 T, multi-shot-turbo spin-echo (TSE) conventional FLAIR, and single-shot-TSE-FLAIR with wide inversion recovery pulse were used. Modified single-shot FLAIR was obtained for 30 patients with suspected stroke who moved during conventional FLAIR scan. Motion artifacts were randomly and independently scored using a 5-grade scale by three radiologists in blinded fashion. Whether the FLAIR vessel hyperintensity sign was present was visually evaluated. Statistical tests included Wilcoxon-signed rank test and weighted Cohen's kappa statistics. The motion artifact score was significantly lower in single-shot FLAIR than in conventional FLAIR (0.37 ± 0.56 vs. 1.83 ± 1.18; p < 0.05. The vessel hyperintensity sign was visualized in 6 and 5 patients on single-shot and conventional FLAIR images, respectively. This study demonstrates the value of single-shot FLAIR for stroke assessment. Single-shot FLAIR reduced motion artifact and visualized vessel hyperintensity sign more than conventional FLAIR. LEVEL OF EVIDENCE: 2. TECHNICAL EFFICACY STAGE: 2.
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Affiliation(s)
- Yoshihiro Kubota
- Department of Radiology, Chiba University Hospital, Chiba, Japan
| | - Hajime Yokota
- Department of Diagnostic Radiology and Radiation Oncology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Takayuki Sakai
- Department of Radiology, Eastern Chiba Medical Center, Chiba, Japan
| | | | - Kenji Ohira
- Department of Radiology, Chiba University Hospital, Chiba, Japan
| | - Takashi Uno
- Department of Diagnostic Radiology and Radiation Oncology, Graduate School of Medicine, Chiba University, Chiba, Japan
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Wada T, Tokunaga C, Togao O, Yoneyama M, Funatsu R, Yamashita Y, Kobayashi K, Kato T. Optimization of the refocusing flip angle in the characterization of cerebrospinal fluid dynamics using multi-spin echo acquisition cine imaging (MUSACI). Magn Reson Imaging 2020; 76:87-95. [PMID: 33232768 DOI: 10.1016/j.mri.2020.11.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 11/16/2020] [Accepted: 11/17/2020] [Indexed: 11/24/2022]
Abstract
PURPOSE Multi-spin echo acquisition cine imaging (MUSACI) is a method used for cerebrospinal fluid (CSF) dynamics imaging based on the proton phase dispersion and flow void using 3D multi-spin echo imaging. In a previous study, the refocusing flip angle of MUSACI was set at a constant 80°. We conducted the present study to investigate the preservation the CSF signal intensity even in a long echo train and improve the ability to visualize CSF movement by modifying the refocusing flip angle in MUSACI. METHODS The MUSACI images were acquired in 10 healthy volunteers (7 men and 3 women; age range 24-44 years; mean age 29.4 ± 6.2 years) with a 3.0 Tesla MR scanner. Five refocusing flip angle sets were applied: constant 30°, constant 50°, constant 80°, pseudo-steady state (PSS) 50°-70°-100° (PSS50°), and PSS80°-100°-130° (PSS80°). In all sequences, the in-plane spatial resolution was 0.58 × 0.58 mm2, and the CSF movement for one heartbeat was drawn at 80-msec intervals. The signal intensity (SI) of CSF in the lateral ventricle, the foramen of Monro, the third ventricle, the fourth ventricle, and the pons was measured on MUSACI. Pearson's correlation coefficient was calculated between the CSF SI and effective echo time (TE; TEeff) in the lateral ventricle. RESULTS Both antegrade and retrograde CSF movements on the midsagittal MUSACI images and the retrograde CSF movement in the foramen of Monro was observed in all sequences with the constant flip angles. A strong reverse correlation between the CSF SI in the lateral ventricle and TEeff values was observed with constant 30° (r = -0.96, p < 0.01), constant 50° (r = -0.97, p < 0.01) and constant 80° (r = -0.88, p < 0.01). A weak positive correlation was observed with PSS50° (r = 0.28, p = 0.43), and a moderate reverse correlation was observed at PSS80° (r = -0.60, p = 0.07). The SI values of the foramen of Monro, the third ventricle, and the fourth ventricle were significantly lower than that of the lateral ventricle, and those values were higher than that of the pons in both the constant 80° sequence and the PSS 50° sequence. CONCLUSION PSS50° could be the optimal flip angle scheme for MUSACI, because the SI changes due to CSF movement and the SI preservation due to a long echo train were large due to the use of the refocusing flip angle method.
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Affiliation(s)
- Tatsuhiro Wada
- Division of Radiology, Department of Medical Technology, Kyushu University Hospital, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
| | - Chiaki Tokunaga
- Division of Radiology, Department of Medical Technology, Kyushu University Hospital, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Osamu Togao
- Department of Molecular Imaging & Diagnosis, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka, 812-8582, Japan
| | - Masami Yoneyama
- Philips Japan, 2-13-37, Konan, Minato-ku, Tokyo 108-8507, Japan
| | - Ryohei Funatsu
- Division of Radiology, Department of Medical Technology, Kyushu University Hospital, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Yasuo Yamashita
- Division of Radiology, Department of Medical Technology, Kyushu University Hospital, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Kouji Kobayashi
- Division of Radiology, Department of Medical Technology, Kyushu University Hospital, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Toyoyuki Kato
- Division of Radiology, Department of Medical Technology, Kyushu University Hospital, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
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Yiannakas MC, Schneider T, Yoneyama M, Aforlabi-Logoh I, Prados F, Ciccarelli O, Wheeler-Kingshott CAM. Magnetisation transfer ratio combined with magnetic resonance neurography is feasible in the proximal lumbar plexus using healthy volunteers at 3T. Sci Rep 2020; 10:14568. [PMID: 32884016 PMCID: PMC7471697 DOI: 10.1038/s41598-020-71570-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Accepted: 08/14/2020] [Indexed: 12/30/2022] Open
Abstract
Magnetic resonance neurography (MRN) has been used extensively to study pathological conditions affecting the peripheral nervous system (PNS). However, tissue damage is assessed qualitatively with little information regarding the underlying pathophysiological processes involved. Magnetisation transfer ratio (MTR) is a quantitative magnetic resonance imaging method which is sensitive to tissue macromolecular content and may therefore have an important role in the study of pathologies affecting the PNS. This study explored the feasibility of obtaining reliable MTR measurements in the proximal lumbar plexus of healthy volunteers using MRN to identify and segment each lumbar segment (L2-L5) and regions (preganglionic, ganglionic and postganglionic). Reproducibility of the MTR measurements and of the segmentation method were assessed from repeated measurements (scan-rescan), and from the reanalysis of images (intra- and inter-rater assessment), by calculating the coefficient of variation (COV). In all segments combined (L2-L5), mean (± SD) MTR was 30.5 (± 2.4). Scan-rescan, intra- and inter-rater COV values were 3.2%, 4.4% and 5.3%, respectively. One-way analysis of variance revealed a statistically significant difference in MTR between the preganglionic and postganglionic regions in all lumbar segments. This pilot study in healthy volunteers demonstrates the feasibility of obtaining reliable MTR measurements in the proximal lumbar plexus, opening up the possibility of studying a broad spectrum of neurological conditions in vivo.
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Affiliation(s)
- Marios C Yiannakas
- NMR Research Unit, Queen Square MS Centre, Department of Neuroinflammation, UCL Queen Square Institute of Neurology, Faculty of Brain Sciences, University College London, Queen Square House, Queen Square, London, WC1N 3BG, UK.
| | | | | | - Innocent Aforlabi-Logoh
- NMR Research Unit, Queen Square MS Centre, Department of Neuroinflammation, UCL Queen Square Institute of Neurology, Faculty of Brain Sciences, University College London, Queen Square House, Queen Square, London, WC1N 3BG, UK
| | - Ferran Prados
- NMR Research Unit, Queen Square MS Centre, Department of Neuroinflammation, UCL Queen Square Institute of Neurology, Faculty of Brain Sciences, University College London, Queen Square House, Queen Square, London, WC1N 3BG, UK
- Centre for Medical Image Computing, Medical Physics and Biomedical Engineering Department, University College London, London, UK
- e-Health Centre, Universitat Oberta de Catalunya, Barcelona, Spain
| | - Olga Ciccarelli
- NMR Research Unit, Queen Square MS Centre, Department of Neuroinflammation, UCL Queen Square Institute of Neurology, Faculty of Brain Sciences, University College London, Queen Square House, Queen Square, London, WC1N 3BG, UK
| | - Claudia A M Wheeler-Kingshott
- NMR Research Unit, Queen Square MS Centre, Department of Neuroinflammation, UCL Queen Square Institute of Neurology, Faculty of Brain Sciences, University College London, Queen Square House, Queen Square, London, WC1N 3BG, UK
- Brain MRI 3T Research Centre, IRCCS Mondino Foundation, Pavia, Italy
- Department of Brain and Behavioural Sciences, University of Pavia, Pavia, Italy
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Obara M, Togao O, Helle M, Murazaki H, Wada T, Yoneyama M, Hamano H, Nakamura M, Van Cauteren M. Improved selective visualization of internal and external carotid artery in 4D-MR angiography based on super-selective pseudo-continuous arterial spin labeling combined with CENTRA-keyhole and view-sharing (4D-S-PACK). Magn Reson Imaging 2020; 73:15-22. [PMID: 32763367 DOI: 10.1016/j.mri.2020.07.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 07/22/2020] [Accepted: 07/30/2020] [Indexed: 11/18/2022]
Abstract
PURPOSE Four-dimensional magnetic resonance angiography (4D-MRA) based on super-selective pseudo-continuous arterial spin labeling, combined with Keyhole and View-sharing (4D-S-PACK) was introduced for scan-accelerated vessel-selective 4D-MRA. Label selectivity and visualization effectiveness were assessed. METHODS Nine healthy volunteers were included in the study. The label selectivity for the imaging of internal carotid artery (ICA) and external carotid artery (ECA) circulation was assessed qualitatively. The contrast-to-noise ratio (CNR) in 4D-S-PACK was measured in four middle cerebral artery (MCA) and superficial temporal artery (STA) segments and compared with that in contrast-inherent inflow-enhanced multi-phase angiography combined with the vessel-selective arterial spin labeling technique (CINEMA-select). Vessel-selective arterial visualization in 4D-S-PACK was assessed qualitatively in a patient with dural arteriovenous fistula and compared with digital subtraction angiography (DSA) and non-vessel selective 4D-PACK. RESULTS 4D-S-PACK vessel selectivity was judged to be at a clinically acceptable level in all cases except one ECA-targeted label. The CNR was significantly higher using 4D-S-PACK compared with CINEMA-select in MCA and STA peripheral segments (p < 0.001). In patient examination, territorial flow visualization in feeding artery and draining vein circulation on 4D-S-PACK were comparable with that on DSA and the identification of such responsible vessels was easier on 4D-S-PACK than on 4D-PACK. CONCLUSION 4D-S-PACK showed high vessel-selectivity and higher visualization effectiveness compared with CINEMA-select. One clinical case was performed and ICA and ECA territorial flow was successfully visualized separately, suggesting clinical usefulness.
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Affiliation(s)
- Makoto Obara
- Philips Japan Ltd, Philips Building, 13-37 Kohnan 2-chome, Minato-ku, Tokyo, 108-8507, Japan.
| | - Osamu Togao
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka, 812-8582, Japan
| | - Michael Helle
- Philips Research, Röntgenstraße 24-26, 22335 Hamburg, Germany
| | - Hiroo Murazaki
- Division of Radiology, Department of Medical Technology, Kyushu University Hospital, 3-1-1 Maidashi Higashi-ku, Fukuoka, 812-8582, Japan
| | - Tatsuhiro Wada
- Division of Radiology, Department of Medical Technology, Kyushu University Hospital, 3-1-1 Maidashi Higashi-ku, Fukuoka, 812-8582, Japan
| | - Masami Yoneyama
- Philips Japan Ltd, Philips Building, 13-37 Kohnan 2-chome, Minato-ku, Tokyo, 108-8507, Japan
| | - Hiroshi Hamano
- Philips Japan Ltd, Philips Building, 13-37 Kohnan 2-chome, Minato-ku, Tokyo, 108-8507, Japan
| | - Masanobu Nakamura
- Philips Japan Ltd, Philips Building, 13-37 Kohnan 2-chome, Minato-ku, Tokyo, 108-8507, Japan
| | - Marc Van Cauteren
- Philips Healthcare, Business Unit MR, Kohnan 2-13-37, Minato-ku, Tokyo, 108-8507, Japan
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Tadenuma H, Abe K, Yoneyama M, Goto Y, Takeyama M, Tanaka I, Sakai S. Improved visualization of diffusion-prepared MR neurography (SHINKEI) in the lumbosacral plexus combining high-intensity reduction (HIRE) technique. Magn Reson Imaging 2020; 69:22-27. [DOI: 10.1016/j.mri.2020.02.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 02/10/2020] [Indexed: 11/15/2022]
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Sato T, Eguchi Y, Norimoto M, Inoue M, Enomoto K, Watanabe A, Sakai T, Yoneyama M, Aoki Y, Orita S, Narita M, Inage K, Shiga Y, Umimura T, Sato M, Suzuki M, Takaoka H, Mizuki N, Kim G, Hozumi T, Hirosawa N, Furuya T, Maki S, Nakamura J, Hagiwara S, Koda M, Akazawa T, Takahashi H, Takahashi K, Ohtori S. Diagnosis of lumbar radiculopathy using simultaneous MR neurography and apparent T2 mapping. J Clin Neurosci 2020; 78:339-346. [PMID: 32336629 DOI: 10.1016/j.jocn.2020.04.072] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 04/13/2020] [Indexed: 11/25/2022]
Abstract
We sought to assess the utility of simultaneous apparent T2 mapping and neurography with the nerve-sheath signal increased by inked rest-tissue rapid acquisition of relaxation-enhancement imaging (SHINKEI-Quant) for the quantitative evaluation of compressed nerves in patients with lumbar radiculopathy. Thirty-two patients with lumbar radiculopathy and 5 healthy subjects underwent simultaneous apparent T2 mapping and neurography with SHINKEI-Quant. Regions of interest (ROIs) were placed in the lumbar dorsal root ganglia (DRG) and the spinal nerves distal to the lumbar nerves bilaterally at L4-S1. The T2 relaxation times were measured on the affected and unaffected sides. The T2 ratio was calculated as the affected side/unaffected side. Pearson correlation coefficients were calculated to determine the correlation between the T2 relaxation times or T2 ratio and clinical symptoms. An ROC curve was used to examine the diagnostic accuracy and threshold of the T2 relaxation times and T2 ratio. We observed no significant differences in the T2 relaxation times between the nerve roots on the left and right at each spinal level in healthy subjects. In patients, lumbar neurography revealed swelling of the involved nerve, and prolonged T2 relaxation times compared with that of the contralateral nerve. The T2 ratio correlated with leg pain. The ROC analysis revealed that the T2 relaxation time threshold was 127 ms and the T2 ratio threshold was 1.07. To our knowledge, this is the first study to show the utility of SHINKEI-Quant for the quantitative evaluation of lumbar radiculopathy.
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Affiliation(s)
- Takashi Sato
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku 260-0856, Japan.
| | - Yawara Eguchi
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku 260-0856, Japan; Department of Orthopaedic Surgery, Shimoshizu National Hospital, 934-5, Shikawatashi, Yotsukaido, Chiba 284-0003, Japan.
| | - Masaki Norimoto
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku 260-0856, Japan.
| | - Masahiro Inoue
- Department of Orthopaedic Surgery, Eastern Chiba Medical Center, 3-6-2 Okayamadai, Togane, Chiba 283-8686, Japan.
| | - Keigo Enomoto
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku 260-0856, Japan
| | - Atsuya Watanabe
- Department of Orthopaedic Surgery, Eastern Chiba Medical Center, 3-6-2 Okayamadai, Togane, Chiba 283-8686, Japan.
| | - Takayuki Sakai
- Department of Radiology, Eastern Chiba Medical Center, 3-6-2 Okayamadai, Togane, Chiba 283-8686, Japan; Faculty of Health Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa, Ishikawa 920-0942, Japan.
| | - Masami Yoneyama
- MR Clinical Science, Philips Japan, 2-13-37 Konan, Minato-ku, Tokyo 108-8507, Japan.
| | - Yasuchika Aoki
- Department of Orthopaedic Surgery, Eastern Chiba Medical Center, 3-6-2 Okayamadai, Togane, Chiba 283-8686, Japan.
| | - Sumihisa Orita
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku 260-0856, Japan.
| | - Miyako Narita
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku 260-0856, Japan.
| | - Kazuhide Inage
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku 260-0856, Japan.
| | - Yasuhiro Shiga
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku 260-0856, Japan.
| | - Tomotaka Umimura
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku 260-0856, Japan.
| | - Masashi Sato
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku 260-0856, Japan.
| | - Masahiro Suzuki
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku 260-0856, Japan.
| | - Hiromitsu Takaoka
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku 260-0856, Japan.
| | - Norichika Mizuki
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku 260-0856, Japan.
| | - Geundong Kim
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku 260-0856, Japan.
| | - Takashi Hozumi
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku 260-0856, Japan.
| | - Naoya Hirosawa
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku 260-0856, Japan.
| | - Takeo Furuya
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku 260-0856, Japan.
| | - Satoshi Maki
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku 260-0856, Japan.
| | - Junichi Nakamura
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku 260-0856, Japan.
| | - Shigeo Hagiwara
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku 260-0856, Japan.
| | - Masao Koda
- Department of Orthopedic Surgery, University of Tsukuba, 1-1-1 Tennodai, Tsukuba-City, Ibaraki 305-8575, Japan.
| | - Tsutomu Akazawa
- Department of Orthopaedic Surgery, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kawasaki, Kanagawa 216-8511, Japan.
| | - Hiroshi Takahashi
- Department of Orthopaedic Surgery, Toho University Sakura Medical Center, 564-1 Shimoshizu, Sakura, Chiba 285-8741, Japan.
| | - Kazuhisa Takahashi
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku 260-0856, Japan.
| | - Seiji Ohtori
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku 260-0856, Japan.
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Fujima N, Kameda H, Shimizu Y, Harada T, Tha KK, Yoneyama M, Kudo K. Utility of a diffusion-weighted arterial spin labeling (DW-ASL) technique for evaluating the progression of brain white matter lesions. Magn Reson Imaging 2020; 69:81-87. [PMID: 32217128 DOI: 10.1016/j.mri.2020.03.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 03/02/2020] [Accepted: 03/19/2020] [Indexed: 12/13/2022]
Abstract
PURPOSE To investigate the utility of diffusion-weighted arterial spin labeling (DW-ASL) for detecting the progression of brain white matter lesions. MATERIALS AND METHODS A total of 492 regions of interest (ROIs) in 41 patients were prospectively analyzed. DW-ASL was performed using the diffusion gradient prepulse of five b-values (0, 25, 60, 102, and 189) before the ASL readout. We calculated the water exchange rate (Kw) with post-processing using the ASL signal information for each b-value. The cerebral blood flow (CBF) was also calculated using b0 images. Using the signal information in FLAIR (fluid-attenuated inversion recovery) images, we classified the severity of white matter lesions into three grades: non-lesion, moderate, and severe. In addition, the normal Kw level was measured from DW-ASL data of 60 ROIs in five control subjects. The degree of variance of the Kw values (Kw-var) was calculated by squaring the value of the difference between each Kw value and the normal Kw level. All patient's ROIs were divided into non-progressive and progressive white matter lesions by comparing the present FLAIR images with those obtained 2 years before this acquisition. RESULTS Compared to the non-progressive group, the progressive group had significantly lower CBF, significantly higher severity grades in FLAIR, and significantly greater Kw-var values. In a receiver operator characteristic curve analysis, a high area under the curve (AUC) of 0.89 was obtained with the use of Kw-var. In contrast, the AUCs of 0.59 for CBF and 0.72 for severity grades in FLAIR were obtained. CONCLUSIONS The DW-ASL technique can be useful to detect the progression of brain white matter lesions. This technique will become a clinical tool for patients with various degrees of white matter lesions.
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Affiliation(s)
- Noriyuki Fujima
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, N14 W5, Kita-Ku, Sapporo 0608638, Japan.
| | - Hiroyuki Kameda
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, N14 W5, Kita-Ku, Sapporo 0608638, Japan
| | - Yukie Shimizu
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, N14 W5, Kita-Ku, Sapporo 0608638, Japan
| | - Taisuke Harada
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, N14 W5, Kita-Ku, Sapporo 0608638, Japan
| | - Khin Khin Tha
- Department of Radiation Medicine, Hokkaido University Graduate School of Medicine, N15 W7, Kita-Ku, Sapporo 0608638, Japan; The Global Station for Quantum Medical Science and Engineering, Global Institution for Collaborative Research and Education, N15 W8, Kita-Ku, Sapporo 0608638, Japan
| | - Masami Yoneyama
- Philips Japan, 3-37 Kohnan 2-chome, Minato-ku, Tokyo 108-8507, Japan
| | - Kohsuke Kudo
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, N14 W5, Kita-Ku, Sapporo 0608638, Japan; The Global Station for Quantum Medical Science and Engineering, Global Institution for Collaborative Research and Education, N15 W8, Kita-Ku, Sapporo 0608638, Japan
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Yoneyama M, Zhang S, Hu HH, Chong LR, Bardo D, Miller JH, Toyonari N, Katahira K, Katsumata Y, Pokorney A, Ng CK, Kouwenhoven M, Van Cauteren M. Free-breathing non-contrast-enhanced flow-independent MR angiography using magnetization-prepared 3D non-balanced dual-echo Dixon method: A feasibility study at 3 Tesla. Magn Reson Imaging 2019; 63:137-146. [DOI: 10.1016/j.mri.2019.08.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 07/18/2019] [Accepted: 08/15/2019] [Indexed: 11/30/2022]
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Kawakubo M, Nagao M, Ishizaki U, Shiina Y, Inai K, Yamasaki Y, Yoneyama M, Sakai S. Feature-Tracking MRI Fractal Analysis of Right Ventricular Remodeling in Adults with Congenitally Corrected Transposition of the Great Arteries. Radiol Cardiothorac Imaging 2019; 1:e190026. [PMID: 33778517 DOI: 10.1148/ryct.2019190026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 07/22/2019] [Accepted: 08/01/2019] [Indexed: 11/11/2022]
Abstract
Purpose To assess a recently available technique for quantification of right ventricular (RV) trabeculae that is based on fractal analysis performed by using cardiac MRI feature tracking, in patients with congenitally corrected transposition of the great arteries (cc-TGA). Materials and Methods A total of 19 patients (eight men, 11 women; mean age, 35 years ± 10 [standard deviation]) with consecutive cc-TGA who underwent cardiac MRI were enrolled in the study. For analysis, patients were divided into two groups: six patients (four men, two women; mean age, 34 years ± 14) with an end-systolic RV volume index higher than 72 mL/m2 (indicative of adverse RV remodeling) and 13 patients (four men, nine women; mean age, 36 years ± 9) in whom this index was lower than or equal to 72 mL/m2 (indicative of adapted RV). The following outcomes were quantified in the midsection of the RV: fractional fractal dimension (FD) and diastolic FD, circumferential strain, and radial strain. Receiver operating characteristic (ROC) analysis was performed to determine the cutoff FD values for the detection of adverse RV remodeling. Correlations among fractional FD, diastolic FD, circumferential strain, and radial strain were calculated by using Pearson correlation coefficient (r) analysis. Results The following ROC values were identified for fractional and diastolic FD: cutoff, 0.09 and 1.39, respectively; area under the ROC curve, 0.95 and 0.68, respectively; sensitivity, 1.00 and 0.33, respectively; and specificity, 0.92 and 1.00, respectively. Fractional FD correlated with circumferential strain and radial strain (r = -0.70 and 0.69, respectively; P < .01), as did diastolic FD (r = 0.37 and -0.38, respectively; P < .05). Conclusion The fractional FD derived from cardiac MRI feature-tracking analysis correlates with adverse RV remodeling, including a changed strain pattern and trabeculae, in patients with cc-TGA.© RSNA, 2019.
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Affiliation(s)
- Masateru Kawakubo
- Department of Health Sciences, Faculty of Medical Sciences (M.K.), and Department of Clinical Radiology, Graduate School of Medical Sciences (Y.Y.), Kyushu University, Fukuoka, Japan; Department of Diagnostic Imaging and Nuclear Medicine (M.N., U.I., S.S.) and Department of Pediatric Cardiology and Adult Congenital Cardiology (Y.S., K.I.), Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, Japan; and Philips Japan, Tokyo, Japan (M.Y.)
| | - Michinobu Nagao
- Department of Health Sciences, Faculty of Medical Sciences (M.K.), and Department of Clinical Radiology, Graduate School of Medical Sciences (Y.Y.), Kyushu University, Fukuoka, Japan; Department of Diagnostic Imaging and Nuclear Medicine (M.N., U.I., S.S.) and Department of Pediatric Cardiology and Adult Congenital Cardiology (Y.S., K.I.), Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, Japan; and Philips Japan, Tokyo, Japan (M.Y.)
| | - Umiko Ishizaki
- Department of Health Sciences, Faculty of Medical Sciences (M.K.), and Department of Clinical Radiology, Graduate School of Medical Sciences (Y.Y.), Kyushu University, Fukuoka, Japan; Department of Diagnostic Imaging and Nuclear Medicine (M.N., U.I., S.S.) and Department of Pediatric Cardiology and Adult Congenital Cardiology (Y.S., K.I.), Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, Japan; and Philips Japan, Tokyo, Japan (M.Y.)
| | - Yumi Shiina
- Department of Health Sciences, Faculty of Medical Sciences (M.K.), and Department of Clinical Radiology, Graduate School of Medical Sciences (Y.Y.), Kyushu University, Fukuoka, Japan; Department of Diagnostic Imaging and Nuclear Medicine (M.N., U.I., S.S.) and Department of Pediatric Cardiology and Adult Congenital Cardiology (Y.S., K.I.), Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, Japan; and Philips Japan, Tokyo, Japan (M.Y.)
| | - Kei Inai
- Department of Health Sciences, Faculty of Medical Sciences (M.K.), and Department of Clinical Radiology, Graduate School of Medical Sciences (Y.Y.), Kyushu University, Fukuoka, Japan; Department of Diagnostic Imaging and Nuclear Medicine (M.N., U.I., S.S.) and Department of Pediatric Cardiology and Adult Congenital Cardiology (Y.S., K.I.), Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, Japan; and Philips Japan, Tokyo, Japan (M.Y.)
| | - Yuzo Yamasaki
- Department of Health Sciences, Faculty of Medical Sciences (M.K.), and Department of Clinical Radiology, Graduate School of Medical Sciences (Y.Y.), Kyushu University, Fukuoka, Japan; Department of Diagnostic Imaging and Nuclear Medicine (M.N., U.I., S.S.) and Department of Pediatric Cardiology and Adult Congenital Cardiology (Y.S., K.I.), Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, Japan; and Philips Japan, Tokyo, Japan (M.Y.)
| | - Masami Yoneyama
- Department of Health Sciences, Faculty of Medical Sciences (M.K.), and Department of Clinical Radiology, Graduate School of Medical Sciences (Y.Y.), Kyushu University, Fukuoka, Japan; Department of Diagnostic Imaging and Nuclear Medicine (M.N., U.I., S.S.) and Department of Pediatric Cardiology and Adult Congenital Cardiology (Y.S., K.I.), Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, Japan; and Philips Japan, Tokyo, Japan (M.Y.)
| | - Shuji Sakai
- Department of Health Sciences, Faculty of Medical Sciences (M.K.), and Department of Clinical Radiology, Graduate School of Medical Sciences (Y.Y.), Kyushu University, Fukuoka, Japan; Department of Diagnostic Imaging and Nuclear Medicine (M.N., U.I., S.S.) and Department of Pediatric Cardiology and Adult Congenital Cardiology (Y.S., K.I.), Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, Japan; and Philips Japan, Tokyo, Japan (M.Y.)
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Eguchi Y, Enomoto K, Sato T, Watanabe A, Sakai T, Norimoto M, Yoneyama M, Aoki Y, Suzuki M, Yamanaka H, Tamai H, Kobayashi T, Orita S, Suzuki M, Inage K, Shiga Y, Hirosawa N, Inoue M, Koda M, Furuya T, Nakamura J, Hagiwara S, Akazawa T, Takahashi H, Takahashi K, Ohtori S. Simultaneous MR neurography and apparent T2 mapping of cervical nerve roots before microendoscopic surgery to treat patient with radiculopathy due to cervical disc herniation: Preliminary results. J Clin Neurosci 2019; 74:213-219. [PMID: 31526679 DOI: 10.1016/j.jocn.2019.08.099] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 08/26/2019] [Indexed: 11/17/2022]
Abstract
There is no imaging modality to quantitatively evaluate compressed cervical nerve roots in cervical radiculopathy. Here we sought to evaluate the usefulness of simultaneous apparent T2 mapping and neurography with nerve-sheath signal increased with inked rest-tissue rapid acquisition of relaxation-enhancement imaging (SHINKEI-Quant) to evaluate compressed nerves quantitatively in patients with cervical radiculopathy due to cervical disc hernia before microendoscopic surgery. One patient with cervical radiculopathy due to cervical disc hernia before microendoscopic surgery and 5 healthy subjects underwent simultaneous apparent T2 mapping and neurography with SHINKEI-Quant. The patient was a 49-year-old man with severe right upper arm pain and numbness. Based on MRI images, we suspected right C7 radiculopathy due to C6-7 cervical disc hernia. The T2 relaxation times of the cervical dorsal root ganglia of the brachial plexus bilaterally at C5-C8 were measured. We observed no significant differences in T2 relaxation times between the nerve roots on the left and right at each spinal level with values in healthy subjects. In our patient, neurography revealed swelling of the right C7 nerve, and a prolonged T2 relaxation time compared with that of the contralateral, unaffected C7 nerve. We performed microendoscopic surgery and the symptoms improved. We were able to evaluate the injured nerve root quantitatively in a patient with cervical radiculopathy using the SHINKEI-Quant technique, being the first study to our knowledge to show the usefulness of this technique to evaluate cervical radiculopathy quantitatively before microendoscopic surgery.
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Affiliation(s)
- Yawara Eguchi
- Department of Orthopaedic Surgery, Shimoshizu National Hospital, 934-5, Shikawatashi, Yotsukaido, Chiba 284-0003, Japan; Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku, 260-0856, Japan.
| | - Keigo Enomoto
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku, 260-0856, Japan.
| | - Takashi Sato
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku, 260-0856, Japan.
| | - Atsuya Watanabe
- Department of Orthopaedic Surgery, Eastern Chiba Medical Center, 3-6-2 Okayamadai, Togane, Chiba 283-8686, Japan.
| | - Takayuki Sakai
- Department of Radiology, Eastern Chiba Medical Center, 3-6-2 Okayamadai, Togane, Chiba 283-8686, Japan; Faculty of Health Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa, Ishikawa 920-0942, Japan.
| | - Masaki Norimoto
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku, 260-0856, Japan
| | - Masami Yoneyama
- MR Clinical Science, Philips Japan, 2-13-37 Konan, Minato-ku, Tokyo 108-8507, Japan.
| | - Yasuchika Aoki
- Department of Orthopaedic Surgery, Eastern Chiba Medical Center, 3-6-2 Okayamadai, Togane, Chiba 283-8686, Japan.
| | - Munetaka Suzuki
- Department of Orthopaedic Surgery, Shimoshizu National Hospital, 934-5, Shikawatashi, Yotsukaido, Chiba 284-0003, Japan.
| | - Hajime Yamanaka
- Department of Orthopaedic Surgery, Shimoshizu National Hospital, 934-5, Shikawatashi, Yotsukaido, Chiba 284-0003, Japan.
| | - Hiroshi Tamai
- Department of Orthopaedic Surgery, Shimoshizu National Hospital, 934-5, Shikawatashi, Yotsukaido, Chiba 284-0003, Japan.
| | - Tatsuya Kobayashi
- Department of Orthopaedic Surgery, Shimoshizu National Hospital, 934-5, Shikawatashi, Yotsukaido, Chiba 284-0003, Japan.
| | - Sumihisa Orita
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku, 260-0856, Japan.
| | - Miyako Suzuki
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku, 260-0856, Japan
| | - Kazuhide Inage
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku, 260-0856, Japan
| | - Yasuhiro Shiga
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku, 260-0856, Japan
| | - Naoya Hirosawa
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku, 260-0856, Japan
| | - Masahiro Inoue
- Department of Radiology, Eastern Chiba Medical Center, 3-6-2 Okayamadai, Togane, Chiba 283-8686, Japan
| | - Masao Koda
- Department of Orthopedic Surgery, University of Tsukuba, 1-1-1 Tennodai, Tsukuba-City, Ibaraki 305-8575, Japan
| | - Takeo Furuya
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku, 260-0856, Japan.
| | - Junichi Nakamura
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku, 260-0856, Japan
| | - Shigeo Hagiwara
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku, 260-0856, Japan
| | - Tsutomu Akazawa
- Department of Orthopaedic Surgery, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kawasaki, Kanagawa 216-8511, Japan.
| | - Hiroshi Takahashi
- Department of Orthopaedic Surgery, Toho University Sakura Medical Center, 564-1 Shimoshizu, Sakura, Chiba 285-8741, Japan.
| | - Kazuhisa Takahashi
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku, 260-0856, Japan.
| | - Seiji Ohtori
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, 1-8-1 Inohana, Chuo-ku, 260-0856, Japan.
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Sakai T, Aoki Y, Watanabe A, Yoneyama M, Ochi S, Miyati T. Functional Assessment of Lumbar Nerve Roots Using Coronal-plane Single-shot Turbo Spin-echo Diffusion Tensor Imaging. Magn Reson Med Sci 2019; 19:159-165. [PMID: 31189790 PMCID: PMC7232038 DOI: 10.2463/mrms.tn.2019-0014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
We investigated the usefulness of diffusion tensor imaging using single-shot turbo spin-echo sequence (TSE–DTI) in detecting the responsible nerve root by multipoint measurements of fractional anisotropy (FA) values. Five patients with bilateral lumbar spinal stenosis showing unilateral neurological symptoms were examined using TSE–DTI. In the spinal canal, FA values in the symptomatic side were lower than those in the asymptomatic side. TSE–DTI using multipoint measurements of FA values can differentiate the responsible lumbar nerve root.
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Affiliation(s)
- Takayuki Sakai
- Department of Radiology, Eastern Chiba Medical Center.,Division of Health Sciences, Graduate School of Medical Sciences, Kanazawa University
| | - Yasuchika Aoki
- Department of General Medical Services, Graduate School of Medicine, Chiba University.,Department of Orthopedic Surgery, Eastern Chiba Medical Center
| | - Atsuya Watanabe
- Department of General Medical Services, Graduate School of Medicine, Chiba University.,Department of Orthopedic Surgery, Eastern Chiba Medical Center
| | | | | | - Tosiaki Miyati
- Division of Health Sciences, Graduate School of Medical Sciences, Kanazawa University
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44
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Ferrer CJ, Bos C, Yoneyama M, Obara M, Kok L, van Leeuwen MS, Bleys RLAW, Moonen CTW, Bartels LW. Respiratory- and cardiac-triggered three-dimensional sheath inked rapid acquisition with refocused echoes imaging (SHINKEI) of the abdomen for magnetic resonance neurography of the celiac plexus. Eur Radiol Exp 2019; 3:14. [PMID: 30923930 PMCID: PMC6439132 DOI: 10.1186/s41747-019-0095-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 11/20/2018] [Indexed: 11/30/2022] Open
Abstract
The visualisation of the celiac plexus using respiratory- and cardiac-triggered three-dimensional (3D) sheath inked rapid acquisition with refocused echoes imaging (SHINKEI) was evaluated. After ethical approval and written informed consent, eight volunteers (age 27 ± 5 years, mean ± standard deviation) were scanned at 1.5 and 3 T. Displacement of the celiac ganglia due to aortic pulsatility was studied on axial single-slice breath-hold balanced turbo field-echo cine sequences in five volunteers and found to be 3.0 ± 0.5 mm (left) and 3.1 ± 0.4 mm (right). Respiratory- and cardiac-triggered 3D SHINKEI images were compared to respiratory- and cardiac-triggered fat-suppressed 3D T2-weighted turbo spin-echo and respiratory-triggered 3D SHINKEI in all volunteers. Visibility of the celiac ganglia was rated by three radiologists as visible or non-visible. On 3D SHINKEI with double-triggering at 1.5 T, the left and right ganglia were seen by all observers in 7/8 and 8/8 volunteers, respectively. At 3 T, this was the case for 6/8 and 7/8 volunteers, respectively. The nerve-to-muscle signal ratio increased from 1.9 ± 0.5 on fat-suppressed 3D T2-weighted turbo spin-echo to 4.7 ± 0.8 with 3D SHINKEI. Anatomical validation was performed in a human cadaver. An expert in anatomy confirmed that the hyperintense structure visible on ex vivo 3D SHINKEI scans was the celiac plexus. In conclusion, double-triggering allowed visualisation of the celiac plexus using 3D SHINKEI at both 1.5 T and 3 T.
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Affiliation(s)
- Cyril J Ferrer
- Imaging Division, University Medical Center Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands.
| | - Clemens Bos
- Imaging Division, University Medical Center Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
| | - Masami Yoneyama
- Philips Japan, 3-37 Kohnan 2-chome, Minato-ku, Tokyo, 108-8507, Japan
| | - Makoto Obara
- Philips Japan, 3-37 Kohnan 2-chome, Minato-ku, Tokyo, 108-8507, Japan
| | - Lisanne Kok
- Imaging Division, University Medical Center Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
| | - Maarten S van Leeuwen
- Department of Radiology, University Medical Centre Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
| | - Ronald L A W Bleys
- Department of Anatomy, University Medical Centre Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
| | - Chrit T W Moonen
- Imaging Division, University Medical Center Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands.,Utrecht University, Domplein 29, 3512 JE, Utrecht, The Netherlands
| | - Lambertus W Bartels
- Imaging Division, University Medical Center Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
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45
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Morita K, Nakaura T, Maruyama N, Iyama Y, Oda S, Utsunomiya D, Namimoto T, Kitajima M, Yoneyama M, Yamashita Y. Hybrid of Compressed Sensing and Parallel Imaging Applied to Three-dimensional Isotropic T 2-weighted Turbo Spin-echo MR Imaging of the Lumbar Spine. Magn Reson Med Sci 2019; 19:48-55. [PMID: 30880300 PMCID: PMC7067917 DOI: 10.2463/mrms.mp.2018-0132] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Purpose: The hybrid compressed sensing (hybrid-CS) technique can shorten the acquisition time compared with the sensitivity encoding (SENSE) technique in lumbar MRI. To evaluate the feasibility of a hybrid-CS technique in comparison with 3D isotropic T2-weighted turbo spin-echo (3D volume isotropic turbo spin-echo acquisition [VISTA]) MRI of the lumbar spine. Materials and Methods: The Institutional Review Board approved this study and informed consent was obtained from participants prior to study entry. Sixteen healthy volunteers underwent lumbar spine 3D VISTA with conventional parallel imaging for SENSE and hybrid-CS at 3T. We recorded the image acquisition times of SENSE and hybrid-CS. We compared the signal-to-noise ratio (SNR) in spine, cerebrospinal fluid (CSF), lumbar disc, epidural fat, and erector spinae muscle, and the contrast of spine, CSF, and disc, and performed qualitative image analysis assessment, between the two image sequences. Results: The image acquisition time for hybrid-CS was 39.2% shorter than that of SENSE (218.4/358.8 s). The contrast of CSF and SNR of the spine was significantly higher with hybrid-CS than with SENSE (P < 0.05). The SNR of the disc and muscle was significantly higher with SENSE than with hybrid-CS (P < 0.05). There were no significant differences in the contrast of spine, disc, and fat, and SNR of CSF and fat between hybrid-CS and SENSE. There were no significant differences in the qualitative evaluation between hybrid-CS and SENSE. Conclusion: Compared with SENSE, hybrid-CS for 3D VISTA can shorten image acquisition time without sacrificing image quality.
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Affiliation(s)
- Kosuke Morita
- Department of Radiology, Kumamoto University Hospital
| | - Takeshi Nakaura
- Department of Diagnostic Radiology, Graduate School of Medical Sciences, Kumamoto University
| | | | - Yuji Iyama
- Department of Diagnostic Radiology, Graduate School of Medical Sciences, Kumamoto University.,Department of Diagnostic Radiology, Red Cross Kumamoto Hospital
| | - Seitaro Oda
- Department of Diagnostic Radiology, Graduate School of Medical Sciences, Kumamoto University
| | - Daisuke Utsunomiya
- Department of Diagnostic Radiology, Graduate School of Medical Sciences, Kumamoto University
| | - Tomohiro Namimoto
- Department of Diagnostic Radiology, Graduate School of Medical Sciences, Kumamoto University
| | - Mika Kitajima
- Department of Diagnostic Radiology, Graduate School of Medical Sciences, Kumamoto University
| | | | - Yasuyuki Yamashita
- Department of Diagnostic Radiology, Graduate School of Medical Sciences, Kumamoto University
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46
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Dillman JR, Trout AT, Merrow AC, Moore RA, Rattan MS, Crotty EJ, Fleck RJ, Yoneyama M, Wang H, Tkach JA. Non-contrast three-dimensional gradient recalled echo Dixon-based magnetic resonance angiography/venography in children. Pediatr Radiol 2019; 49:407-414. [PMID: 30406414 DOI: 10.1007/s00247-018-4297-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 09/18/2018] [Accepted: 10/24/2018] [Indexed: 12/25/2022]
Abstract
Magnetic resonance imaging (MRI) has been considered a valuable diagnostic tool for noninvasive imaging of the vasculature in children and adults for more than two decades. While a variety of non-contrast MRI methods have been described for imaging of both arteries and veins (e.g., time-of-flight, phase contrast, and balanced steady-state free precession imaging), contrast-enhanced magnetic resonance angiography/venography are the most commonly employed vascular imaging techniques due to their high spatial and contrast resolutions and general reliability. In this technical innovation article, we describe a novel 3-D respiratory-triggered gradient recalled echo Dixon-based MR angiography/MR venography technique that provides high-resolution anatomical imaging of the vasculature of the neck, body and extremities without the need for intravenous contrast material or breath-holding.
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Affiliation(s)
- Jonathan R Dillman
- Department of Radiology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave., Cincinnati, OH, 45229, USA. .,Department of Radiology, University of Cincinnati College of Medicine, Cincinnati, OH, USA.
| | - Andrew T Trout
- Department of Radiology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave., Cincinnati, OH, 45229, USA.,Department of Radiology, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Arnold C Merrow
- Department of Radiology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave., Cincinnati, OH, 45229, USA.,Department of Radiology, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Ryan A Moore
- Heart Institute, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Mantosh S Rattan
- Department of Radiology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave., Cincinnati, OH, 45229, USA.,Department of Radiology, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Eric J Crotty
- Department of Radiology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave., Cincinnati, OH, 45229, USA.,Department of Radiology, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Robert J Fleck
- Department of Radiology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave., Cincinnati, OH, 45229, USA.,Department of Radiology, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | | | - Hui Wang
- Department of Radiology, University of Cincinnati College of Medicine, Cincinnati, OH, USA.,Philips Healthcare, Best, The Netherlands
| | - Jean A Tkach
- Department of Radiology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave., Cincinnati, OH, 45229, USA.,Department of Radiology, University of Cincinnati College of Medicine, Cincinnati, OH, USA
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47
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Akamine Y, Obara M, Togao O, Shibukawa S, Yoneyama M, Okuaki T, Van Cauteren M. Robust visualization of middle cerebral artery main trunk by enhanced acceleration-selective arterial spin labeling (eAccASL) for intracranial MRA. Magn Reson Med 2018; 81:3185-3191. [DOI: 10.1002/mrm.27603] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 10/18/2018] [Accepted: 10/19/2018] [Indexed: 12/16/2022]
Affiliation(s)
| | | | - Osamu Togao
- Department of Clinical Radiology, Graduate School of Medical Sciences; Kyushu University; Fukuoka Japan
| | - Shuhei Shibukawa
- Department of Radiology; Tokai University Hospital; Kanagawa Japan
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48
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Suzuki M, Morita S, Goto Y, Tadenuma H, Nishina Y, Yoneyama M, Tanaka I, Sakai S. Artifact-robust diffusion-weighted whole-body imaging with background suppression at 3 T using improved turbo spin-echo diffusion-weighted imaging. Br J Radiol 2018; 92:20180489. [PMID: 30407840 DOI: 10.1259/bjr.20180489] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE: To compare single-shot turbo spin-echo (TSE) diffusion-weighted whole-body imaging with background suppression (DWIBS) and echo-planar imaging (EPI) DWIBS to determine the feasibility of direct-coronal TSE-DWIBS. METHODS: All measurements were performed using a 3.0 T MRI scanner. In the phantom study, we compared the contrast ratios (CRs) of tumor-mimicking phantom (tumor) to muscle-mimicking phantom (muscle) and water to muscle and the signal-to-noise ratio (SNR) between TSE-DWIBS and EPI-DWIBS. In the volunteer study, 10 healthy volunteers were whole-body scanned with direct-coronal TSE-DWIBS, direct-coronal EPI-DWIBS (corEPI-DWIBS), and transverse EPI-DWIBS (traEPI-DWIBS). Two radiologists assessed the image distortion, uniformity of fat suppression, overall artifacts, and overall image quality in maximum intensity projection (MIP) images from each DWIBS image using a 5-point scale. RESULTS: In the phantom study, the CR of tumor to muscle was found to be lower for TSE-DWIBS (10.57 ± 0.45) than for EPI-DWIBS (15.38 ± 0.27), and the CR of water to muscle was higher for TSE-DWIBS (9.61 ± 0.66) than for EPI-DWIBS (2.52 ± 0.60). The volunteer study revealed good inter observer agreement between TSE-DWIBS and EPI-DWIBS with respect to image distortion, uniformity of fat suppression, overall artifacts, and overall image quality, with weighted Cohen's κ coefficients of 0.91, 0.74, 0.87, and 0.72, respectively. Qualitative analysis scores for image distortion, uniformity of fat suppression, overall artifacts, and overall image quality were significantly higher for TSE-DWIBS than for corEPI-DWIBS or traEPI-DWIBS (p < 0.05). CONCLUSION: Direct-coronal TSE-DWIBS is robust against magnetic field inhomogeneity. High-quality images without distortion or fat suppression inhomogeneity were obtained. ADVANCES IN KNOWLEDGE: Many studies on DWIBS have been previously reported; however, these studies used EPI read-out. To the best of our knowledge, no studies using TSE read-out have been reported. In this study, we examined the feasibility of TSE-DWIBS with lesser artifacts than EPI-DWIBS.
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Affiliation(s)
- Makoto Suzuki
- 1 Department of Radiological Service, Tokyo Women's Medical University Hospital , Shinjuku , Japan.,2 Diagnostic Imaging Center, Kurume University Hospital , Kurume , Japan
| | - Satoru Morita
- 3 Department of Diagnostic Imaging and Nuclear Medicine, Tokyo Women's Medical University Hospital , Shinjuku , Japan
| | - Yasuhiro Goto
- 1 Department of Radiological Service, Tokyo Women's Medical University Hospital , Shinjuku , Japan
| | - Hitoshi Tadenuma
- 1 Department of Radiological Service, Tokyo Women's Medical University Hospital , Shinjuku , Japan
| | - Yu Nishina
- 3 Department of Diagnostic Imaging and Nuclear Medicine, Tokyo Women's Medical University Hospital , Shinjuku , Japan
| | | | - Isao Tanaka
- 1 Department of Radiological Service, Tokyo Women's Medical University Hospital , Shinjuku , Japan
| | - Shuji Sakai
- 3 Department of Diagnostic Imaging and Nuclear Medicine, Tokyo Women's Medical University Hospital , Shinjuku , Japan
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49
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Hiwatashi A, Togao O, Yamashita K, Kikuchi K, Momosaka D, Nakatake H, Yamasaki R, Ogata H, Yoneyama M, Kira JI, Honda H. Simultaneous MR neurography and apparent T2 mapping in brachial plexus: Evaluation of patients with chronic inflammatory demyelinating polyradiculoneuropathy. Magn Reson Imaging 2018; 55:112-117. [PMID: 30266626 DOI: 10.1016/j.mri.2018.09.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 09/03/2018] [Accepted: 09/24/2018] [Indexed: 12/17/2022]
Abstract
PURPOSE MR neurography is known to be useful to evaluate nerve pathology. The purpose of this study was to evaluate the usefulness of simultaneous apparent T2 mapping and neurography with nerve-sheath signal increased with inked rest-tissue rapid acquisition of relaxation enhancement imaging (SHINKEI) to distinguish patients with chronic inflammatory demyelinating polyneuropathy (CIDP) from healthy subjects. MATERIALS AND METHODS This retrospective study included 13 patients with CIDP and five healthy subjects from 2015 to 2017. The T2 relaxation time and the size of the cervical ganglia and roots of the brachial plexus were measured. Statistical analyses were performed with the Mann-Whitney U test and receiver operating characteristics (ROC) analysis. RESULTS The T2 relaxation times of the ganglia and roots were longer in patients with CIDP (119.31 ± 35.53 msec and 111.15 ± 33.82 msec) than in healthy subjects (101.42 ± 26.42 msec and 85.29 ± 13.22 msec, P = 0.0007 and P < 0.0001, respectively). The sizes of the ganglia and the roots were larger in patients with CIDP (6.25 ± 1.56 mm and 4.37 ± 1.71 mm) than in healthy subjects (5.59 ± 1.08 mm and 3.50 ± 0.62 mm, P = 0.0114 and P = 0.0014, respectively). ROC analysis revealed that T2 relaxation time of the roots was best at distinguishing CIDP patients from healthy subjects (the area under the curve = 0.748). CONCLUSION Patients with CIDP could be distinguished from healthy subjects using simultaneous apparent T2 mapping and neurography with SHINKEI.
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Affiliation(s)
- Akio Hiwatashi
- Departments of Molecular Imaging & Diagnosis, Graduate School of Medical Sciences, Kyushu University, Japan.
| | - Osamu Togao
- Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Japan
| | - Koji Yamashita
- Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Japan
| | - Kazufumi Kikuchi
- Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Japan
| | - Daichi Momosaka
- Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Japan
| | - Hiroshi Nakatake
- Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Japan
| | - Ryo Yamasaki
- Neurology, Graduate School of Medical Sciences, Kyushu University, Japan
| | - Hidenori Ogata
- Neurology, Graduate School of Medical Sciences, Kyushu University, Japan
| | | | - Jun-Ichi Kira
- Neurology, Graduate School of Medical Sciences, Kyushu University, Japan
| | - Hiroshi Honda
- Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Japan
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Doishita S, Sakamoto S, Yoneda T, Uda T, Tsukamoto T, Yamada E, Yoneyama M, Kimura D, Katayama Y, Tatekawa H, Shimono T, Ohata K, Miki Y. Differentiation of Brain Metastases and Gliomas Based on Color Map of Phase Difference Enhanced Imaging. Front Neurol 2018; 9:788. [PMID: 30298047 PMCID: PMC6160550 DOI: 10.3389/fneur.2018.00788] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 08/31/2018] [Indexed: 12/14/2022] Open
Abstract
Background and objective: Phase difference enhanced imaging (PADRE), a new phase-related MRI technique, can enhance both paramagnetic and diamagnetic substances, and select which phases to be enhanced. Utilizing these characteristics, we developed color map of PADRE (Color PADRE), which enables simultaneous visualization of myelin-rich structures and veins. Our aim was to determine whether Color PADRE is sufficient to delineate the characteristics of non-gadolinium-enhancing T2-hyperintense regions related with metastatic tumors (MTs), diffuse astrocytomas (DAs) and glioblastomas (GBs), and whether it can contribute to the differentiation of MTs from GBs. Methods: Color PADRE images of 11 patients with MTs, nine with DAs and 17 with GBs were created by combining tissue-enhanced, vessel-enhanced and magnitude images of PADRE, and then retrospectively reviewed. First, predominant visibility of superficial white matter and deep medullary veins within non-gadolinium-enhancing T2-hyperintense regions were compared among the three groups. Then, the discriminatory power to differentiate MTs from GBs was assessed using receiver operating characteristic analysis. Results: The degree of visibility of superficial white matter was significantly better in MTs than in GBs (p = 0.017), better in GBs than in DAs (p = 0.014), and better in MTs than in DAs (p = 0.0021). On the contrary, the difference in the visibility of deep medullary veins was not significant (p = 0.065). The area under the receiver operating characteristic curve to discriminate MTs from GBs was 0.76 with a sensitivity of 80% and specificity of 64%. Conclusion: Visibility of superficial white matter on Color PADRE reflects inferred differences in the proportion of vasogenic edema and tumoral infiltration within non-gadolinium-enhancing T2-hyperintense regions of MTs, DAs and GBs. Evaluation of peritumoral areas on Color PADRE can help to distinguish MTs from GBs.
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Affiliation(s)
- Satoshi Doishita
- Department of Diagnostic and Interventional Radiology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Shinichi Sakamoto
- Department of Diagnostic and Interventional Radiology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Tetsuya Yoneda
- Department of Medical Physics in Advanced Biomedical Sciences, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Takehiro Uda
- Department of Neurosurgery, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Taro Tsukamoto
- Department of Diagnostic and Interventional Radiology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Eiji Yamada
- Department of Radiological Technology, Osaka City University Hospital, Osaka, Japan
| | | | - Daisuke Kimura
- Department of Radiological Technology, Osaka City University Hospital, Osaka, Japan
| | - Yutaka Katayama
- Department of Radiological Technology, Osaka City University Hospital, Osaka, Japan
| | - Hiroyuki Tatekawa
- Department of Diagnostic and Interventional Radiology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Taro Shimono
- Department of Diagnostic and Interventional Radiology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Kenji Ohata
- Department of Neurosurgery, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Yukio Miki
- Department of Diagnostic and Interventional Radiology, Osaka City University Graduate School of Medicine, Osaka, Japan
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