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Cheng SJ, Tsai PH, Lee YT, Li YT, Chung HW, Chen CY. Diffusion Tensor Imaging of the Spinal Cord. Magn Reson Imaging Clin N Am 2021; 29:195-204. [PMID: 33902903 DOI: 10.1016/j.mric.2021.02.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Spinal cord often is regarded as one of the last territories in the central nervous system where diffusion tensor imaging (DTI) can be used to probe white matter architecture. This article reviews current progress in spinal cord DTI, starting with anatomic properties and technical challenges that make spinal cord DTI a difficult task. Several possibilities offered by advanced pulse sequences that might overcome the difficulties are addressed, with associated trade-offs and limitations. Potential clinical assistance also is discussed in various spinal cord pathologies, such as myelopathy due to external compression, spinal cord tumors, acute ischemia, traumatic injury, and so forth.
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Affiliation(s)
- Sho-Jen Cheng
- Department of Medical Imaging, Taipei Medical University Hospital, 252 Wu-Hsing Street, Taipei 110, Taiwan
| | - Ping-Huei Tsai
- Department of Medical Imaging and Radiological Sciences, Chung-Shan Medical University, No.110, Sec.1, Jianguo N. Road, Taichung 40201, Taiwan
| | - Yun-Ting Lee
- Translational Imaging Research Center, Taipei Medical University Hospital, 252 Wu-Hsing Street, Taipei 110, Taiwan
| | - Yi-Tien Li
- Translational Imaging Research Center, Taipei Medical University Hospital, 252 Wu-Hsing Street, Taipei 110, Taiwan
| | - Hsiao-Wen Chung
- Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, No.1, Sec.4, Roosevelt Road, Taipei 10617, Taiwan; Department of Electrical Engineering, National Taiwan University, No.1, Sec.4, Roosevelt Road, Taipei 10617, Taiwan.
| | - Cheng-Yu Chen
- Department of Medical Imaging, Taipei Medical University Hospital, 252 Wu-Hsing Street, Taipei 110, Taiwan; Translational Imaging Research Center, Taipei Medical University Hospital, 252 Wu-Hsing Street, Taipei 110, Taiwan; Department of Radiology, School of Medicine, College of Medicine, Taipei Medical University, 250 Wu-Hsing Street, Taipei 110, Taiwan
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2
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Zhang Y, Jiang K, Jiang W, Wang N, Wright AJ, Liu A, Wang J. Multi-task convolutional neural network-based design of radio frequency pulse and the accompanying gradients for magnetic resonance imaging. NMR IN BIOMEDICINE 2021; 34:e4443. [PMID: 33200468 DOI: 10.1002/nbm.4443] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 10/21/2020] [Accepted: 10/21/2020] [Indexed: 06/11/2023]
Abstract
Modern MRI systems usually load the predesigned RFs and the accompanying gradients during clinical scans, with minimal adaption to the specific requirements of each scan. Here, we describe a neural network-based method for real-time design of excitation RF pulses and the accompanying gradients' waveforms to achieve spatially two-dimensional selectivity. Nine thousand sets of radio frequency (RF) and gradient waveforms with two-dimensional spatial selectivity were generated as the training dataset using the Shinnar-Le Roux (SLR) method. Neural networks were created and trained with five strategies (TS-1 to TS-5). The neural network-designed RF and gradients were compared with their SLR-designed counterparts and underwent Bloch simulation and phantom imaging to investigate their performances in spin manipulations. We demonstrate a convolutional neural network (TS-5) with multi-task learning to yield both the RF pulses and the accompanying two channels of gradient waveforms that comply with the SLR design, and these design results also provide excitation spatial profiles comparable with SLR pulses in both simulation (normalized root mean square error [NRMSE] of 0.0075 ± 0.0038 over the 400 sets of testing data between TS-5 and SLR) and phantom imaging. The output RF and gradient waveforms between the neural network and SLR methods were also compared, and the joint NRMSE, with both RF and the two channels of gradient waveforms considered, was 0.0098 ± 0.0024 between TS-5 and SLR. The RF and gradients were generated on a commercially available workstation, which took ~130 ms for TS-5. In conclusion, we present a convolutional neural network with multi-task learning, trained with SLR transformation pairs, that is capable of simultaneously generating RF and two channels of gradient waveforms, given the desired spatially two-dimensional excitation profiles.
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Affiliation(s)
- Yajing Zhang
- MR Clinical Science, Philips Healthcare (Suzhou), Suzhou, China
| | - Ke Jiang
- MSC Clinical & Technical Solutions, Philips Healthcare, Beijing, China
| | - Weiwei Jiang
- MR Clinical Science, Philips Healthcare (Suzhou), Suzhou, China
| | - Nan Wang
- Department of Radiology, the First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Alan J Wright
- Cancer Research UK Cambridge Institute, University of Cambridge, Li Ka Shing Centre, Cambridge, UK
| | - Ailian Liu
- Department of Radiology, the First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Jiazheng Wang
- MSC Clinical & Technical Solutions, Philips Healthcare, Beijing, China
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Han X, Ma X, Li D, Wang J, Jiang W, Cheng X, Li G, Guo H, Tian W. The Evaluation and Prediction of Laminoplasty Surgery Outcome in Patients with Degenerative Cervical Myelopathy Using Diffusion Tensor MRI. AJNR Am J Neuroradiol 2020; 41:1745-1753. [PMID: 32816762 DOI: 10.3174/ajnr.a6705] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Accepted: 06/09/2020] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE DTI has been proved valuable for the diagnosis of degenerative cervical myelopathy, whereas its capacity for predicting the outcome of surgery is still under debate. Here we conduct a prospective cohort study to analyze the capacity of DTI for evaluating and predicting laminoplasty surgery outcome for degenerative cervical myelopathy. MATERIALS AND METHODS We recruited 55 patients with degenerative cervical myelopathy who underwent DTI before surgery and at 3- and 6-month follow-up stages, and 20 healthy subjects. For clinical assessment, the modified Japanese Orthopedic Association scale was recorded for each patient at different stages. DTI metrics were compared between patients before surgery and healthy subjects. Spearman correlation and receiver operating characteristic were used to analyze the evaluation and prediction capacity of DTI for the modified Japanese Orthopedic Association scale, respectively. We analyzed different vertebral levels: maximal compression level, average of all compression levels, and C2 level. RESULTS DTI metrics were significantly different between patients before surgery and healthy subjects. Before surgery, DTI for the maximal compression level or DTI for the average of all compression levels had no significant correlation with the modified Japanese Orthopedic Association scale. For all stages, DTI at the C2 level was correlated with the modified Japanese Orthopedic Association scale. DTI metrics at the C2 level before surgery were significantly correlated with the postoperative modified Japanese Orthopedic Association scale recovery rate. Receiver operating characteristic analysis demonstrated that fractional anisotropy at C2 was capable of predicting the postoperative modified Japanese Orthopedic Association scale recovery rate (P = .04). CONCLUSIONS The DTI metrics before laminoplasty surgery, especially fractional anisotropy at the C2 level, have the potential for evaluating and predicting the degenerative cervical myelopathy surgery outcome.
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Affiliation(s)
- X Han
- From the Department of Spine Surgery (X.H., D.L., J.W., W.T.), Beijing Jishuitan Hospital, Beijing, China.,Beijing Institute of Traumatology and Orthopaedics (X.H.), Beijing, China
| | - X Ma
- Center for Magnetic Resonance Research (X.M.), University of Minnesota, Minneapolis, Minnesota
| | - D Li
- From the Department of Spine Surgery (X.H., D.L., J.W., W.T.), Beijing Jishuitan Hospital, Beijing, China.,National Center of Gerontology (D.L.), Beijing, China
| | - J Wang
- From the Department of Spine Surgery (X.H., D.L., J.W., W.T.), Beijing Jishuitan Hospital, Beijing, China
| | - W Jiang
- Department of Radiology (W.J., X.C., G.L.), Beijing Jishuitan Hospital, Beijing, China
| | - X Cheng
- Department of Radiology (W.J., X.C., G.L.), Beijing Jishuitan Hospital, Beijing, China
| | - G Li
- Department of Radiology (W.J., X.C., G.L.), Beijing Jishuitan Hospital, Beijing, China
| | - H Guo
- Center for Biomedical Imaging Research (H.F.), Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, China
| | - W Tian
- From the Department of Spine Surgery (X.H., D.L., J.W., W.T.), Beijing Jishuitan Hospital, Beijing, China
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Cai JS, Chen HY, Chen JY, Lu YF, Sun JZ, Zhou Y, Yu RS. Reduced field-of-view diffusion-weighted imaging (DWI) in patients with gastric cancer: Comparison with conventional DWI techniques at 3.0T: A preliminary study. Medicine (Baltimore) 2020; 99:e18616. [PMID: 31895817 PMCID: PMC6946437 DOI: 10.1097/md.0000000000018616] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
To evaluate the qualitative image quality and quantitative apparent diffusion coefficient (ADC) value of reduced field-of view (rFOV) and full field-of-view (fFOV) diffusion-weighted imaging (DWI) sequences at 3.0 T in patients with gastric cancer.Fifty-three patients (37 males, 16 females; mean age, 63.3 ± 10.3 years) with 60 lesions with gastric cancer who underwent magnetic resonance (MR) scans, including both rFOV-DWI and fFOV-DWI, were retrospectively analyzed. Two observers subjectively evaluated image quality for both the fFOV-DWI and rFOV-DWI sequences regarding the anatomic details, distortion, lesion conspicuity, artifacts, and overall image quality. The mean ADC values of gastric cancer were calculated. The Wilcoxon test and paired samples t test were used. Interobserver agreement was assessed using kappa statistics.The mean scores based on the 2 observers demonstrated significant differences in image quality in terms of anatomic details, distortion, lesion conspicuity, artifacts and overall image quality at both b values between rFOV-DWI and fFOV-DWI (P < .05) in the whole gastric area. rFOV-DWI yielded significantly better scores in image quality at b = 800 seconds/mm (P < .05) in patients with esophagogastric junction cancers, but there were no significant differences in the gastric corpus and gastric antrum region. The mean tumor ADC values of rFOV-DWI were significantly lower than those of fFOV-DWI (1.237 ± 0.228 × 10-3 mm/second vs 1.683 ± 0.322 × 10-3 mm/second, P < .001).rFOV-DWI yielded significantly better image quality (anatomic details, distortion, lesion conspicuity, artifacts, overall image quality) and more accurate ADC measurements than fFOV-DWI did.
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Affiliation(s)
| | | | | | | | | | - Ying Zhou
- Department of Neurology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
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Novel Technique of Coregistered Intraoperative Computed Tomography and Preoperative Magnetic Resonance Imaging and Diffusion Tensor Imaging Navigation in Spinal Cord Tumor Resection. Ochsner J 2019; 19:43-48. [PMID: 30983901 DOI: 10.31486/toj.18.0107] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Background: Intradural spinal tumors are surgically challenging lesions, and intraoperative spinal navigation offers clear potential assistance. While intraoperative computed tomography (iCT) of bony anatomy is routinely performed, coregistration with magnetic resonance imaging (MRI) and diffusion tensor imaging (DTI) to facilitate intradural spinal tumor resection is not widely described. We present 2 cases in which iCT was coregistered with MRI and DTI for navigational guidance in the resection of intradural spinal tumors to assess technical feasibility and surgical efficacy. Case Series: Navigation using coregistered iCT/MRI was used in the resection of one extramedullary and one intramedullary cervicomedullary tumor. The iCT was obtained following open midline exposure of bony anatomy. The images were then coregistered with preoperative MRI sequences to allow for optical tracking navigation via an optical tracking station (Brainlab). For the intramedullary tumor, preoperative DTI sequences were also coregistered for enhanced identification of relevant anatomy. Navigational accuracy for all cases was confirmed to be acceptable at the level of the posterior bony elements, the dura, and the tumor-parenchyma interface. Conclusion: The coregistration of preoperative MRI sequences and iCT images allowed for meaningfully enhanced navigation during resection. In the case involving the intramedullary cervicomedullary tumor with marked distortion of longitudinal tracts, iCT/DTI navigation allowed for accurate visualization of critical structures and facilitated delineation of tumor margins that otherwise would have been difficult. The use of combined iCT and preoperative MRI/DTI neuronavigational guidance is an effective approach in the resection of intradural extramedullary and intramedullary spinal cord tumors.
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Hu J, Li M, Dai Y, Geng C, Tong B, Zhou Z, Liang X, Yang W, Zhang B. Combining SENSE and reduced field-of-view for high-resolution diffusion weighted magnetic resonance imaging. Biomed Eng Online 2018; 17:77. [PMID: 29903023 PMCID: PMC6003092 DOI: 10.1186/s12938-018-0511-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Accepted: 06/05/2018] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND In diffusion-weighted magnetic resonance imaging (DWI) using single-shot echo planar imaging (ss-EPI), both reduced field-of-view (FOV) excitation and sensitivity encoding (SENSE) alone can increase in-plane resolution to some degree. However, when the two techniques are combined to further increase resolution without pronounced geometric distortion, the resulted images are often corrupted by high level of noise and artifact due to the numerical restriction in SENSE. Hence, this study is aimed to provide a reconstruction method to deal with this problem. METHODS The proposed reconstruction method was developed and implemented to deal with the high level of noise and artifact in the combination of reduced FOV imaging and traditional SENSE, in which all the imaging data were considered jointly by incorporating the motion induced phase variations among excitations. The in vivo human spine diffusion images from ten subjects were acquired at 1.5 T and reconstructed using the proposed method, and compared with SENSE magnitude average results for a range of reduction factors in reduced FOV. These images were evaluated by two radiologists using visual scores (considering distortion, noise and artifact levels) from 1 to 10. RESULTS The proposed method was able to reconstruct images with greatly reduced noise and artifact compared to SENSE magnitude average. The mean g-factors were maintained close to 1 along with enhanced signal-to-noise ratio efficiency. The image quality scores of the proposed method were significantly higher (P < 0.01) than SENSE magnitude average for all the evaluated reduction factors. CONCLUSION The proposed method can improve the combination of SENSE and reduced FOV for high-resolution ss-EPI DWI with reduced noise and artifact.
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Affiliation(s)
- Jisu Hu
- Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, Jiangsu, China
| | - Ming Li
- Department of Radiology, Affiliated Drum Tower Hospital of Nanjing University Medical School, 321 Zhongshan Road, Nanjing, Jiangsu, China
| | - Yakang Dai
- Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, Jiangsu, China
| | - Chen Geng
- Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, Jiangsu, China
| | - Baotong Tong
- Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, Jiangsu, China
| | - Zhiyong Zhou
- Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, Jiangsu, China
| | - Xue Liang
- Department of Radiology, Affiliated Drum Tower Hospital of Nanjing University Medical School, 321 Zhongshan Road, Nanjing, Jiangsu, China
| | - Wen Yang
- Department of Radiology, Affiliated Drum Tower Hospital of Nanjing University Medical School, 321 Zhongshan Road, Nanjing, Jiangsu, China
| | - Bing Zhang
- Department of Radiology, Affiliated Drum Tower Hospital of Nanjing University Medical School, 321 Zhongshan Road, Nanjing, Jiangsu, China.
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Kanamoto H, Eguchi Y, Oikawa Y, Orita S, Inage K, Fujimoto K, Shiga Y, Abe K, Inoue M, Kinoshita H, Matsumoto K, Masuda Y, Furuya T, Koda M, Aoki Y, Watanabe A, Takahashi K, Ohtori S. Visualization of lumbar nerves using reduced field of view diffusion tensor imaging in healthy volunteers and patients with degenerative lumbar disorders. Br J Radiol 2017; 90:20160929. [PMID: 28937274 PMCID: PMC6047648 DOI: 10.1259/bjr.20160929] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Revised: 08/08/2017] [Accepted: 08/31/2017] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE We investigated high resolution diffusion tensor imaging (DTI) of lumbar nerves with reduced field of view (rFOV) using 3 T MRI. METHODS DTI measured with rFOV was compared with conventional FOV (cFOV) 3.0 T MRI in 5 healthy volunteers and 10 patients with degenerative lumbar disorders. The intracanal, foramina and extraforamina of the L5 nerve were established as the regions of interest and fractional anisotropy (FA) values and apparent diffusion coefficient (ADC) values were measured. Image quality for tractography and FA maps and ADC maps, interindividual and intraindividual reliability of FA and ADC, and signal-to-noise (SNR) were studied. RESULTS Both of image qualities with tractography, FA map and ADC map showed that lumbar nerves were more clearly imaged with the rFOV. Intraindividual reliability was higher with rFOV compared with the conventional method for ADC values, while interindividual reliability was higher for both FA values and ADC values with the rFOV method over the conventional method (p < 0.05). Significantly higher SNR was obtained with rFOV compared with cFOV in the spinal canal (p < 0.05). CONCLUSION rFOV enabled clearer imaging of the lumbar nerve, allowing for more accurate measurement of FA and ADC values. Significantly higher SNR was obtained with rFOV compared with cFOV in the spinal canal. To our knowledge, this research showed for the first time the usefulness of rFOV in patients with degenerative lumbar disorders. High resolution DTI using rFOV may become useful in clinical applications because visualization of nerve entrapments and quantification of DTI parameters may allow more accurate diagnoses of lumbar nerve dysfunction. Advances in knowledge: Compared with traditional methods, rFOV allows for clear imaging of the lumbar nerve and enables accurate measurements of the FA and ADC values. High-resolution DTI with rFOV may be used to visualize nerve entrapments and allow for more accurate diagnosis of DTI parameter quantification with opportunities for clinical applications.
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Affiliation(s)
- Hirohito Kanamoto
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Inohana, Chuo-ku,Graduate School of Medicine, Chiba University, Inohana, Chuo-ku, Chiba, Japan
| | - Yawara Eguchi
- Department of Orthopaedic Surgery, Shimoshizu National HospitalShikawatashi, Yotsukaido,Shimoshizu National HospitalShikawatashi, Yotsukaido, Shimoshizu National HospitalShikawatashi, Yotsukaido, Chiba, Japan
| | - Yasuhiro Oikawa
- Division of Orthopaedic Surgery, Chiba Children’s Hospital, Heta-Chou, Midori-ku,Chiba Children’s Hospital, Heta-Chou, Midori-ku, Chiba, Japan
| | - Sumihisa Orita
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Inohana, Chuo-ku,Graduate School of Medicine, Chiba University, Inohana, Chuo-ku, Chiba, Japan
| | - Kazuhide Inage
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Inohana, Chuo-ku,Graduate School of Medicine, Chiba University, Inohana, Chuo-ku, Chiba, Japan
| | - Kazuki Fujimoto
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Inohana, Chuo-ku,Graduate School of Medicine, Chiba University, Inohana, Chuo-ku, Chiba, Japan
| | - Yasuhiro Shiga
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Inohana, Chuo-ku,Graduate School of Medicine, Chiba University, Inohana, Chuo-ku, Chiba, Japan
| | - Koki Abe
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Inohana, Chuo-ku,Graduate School of Medicine, Chiba University, Inohana, Chuo-ku, Chiba, Japan
| | - Masahiro Inoue
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Inohana, Chuo-ku,Graduate School of Medicine, Chiba University, Inohana, Chuo-ku, Chiba, Japan
| | - Hideyuki Kinoshita
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Inohana, Chuo-ku,Graduate School of Medicine, Chiba University, Inohana, Chuo-ku, Chiba, Japan
| | - Koji Matsumoto
- Department of Radiology, Chiba University Hospital, Inohana, Chuo-ku,Chiba University Hospital, Inohana, Chuo-ku, Chiba, Japan
| | - Yoshitada Masuda
- Department of Radiology, Chiba University Hospital, Inohana, Chuo-ku,Chiba University Hospital, Inohana, Chuo-ku, Chiba, Japan
| | - Takeo Furuya
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Inohana, Chuo-ku,Graduate School of Medicine, Chiba University, Inohana, Chuo-ku, Chiba, Japan
| | - Masao Koda
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Inohana, Chuo-ku,Graduate School of Medicine, Chiba University, Inohana, Chuo-ku, Chiba, Japan
| | - Yasuchika Aoki
- Department of Orthopaedic Surgery, Eastern Chiba Medical CenterOkayamadai, Togane,Eastern Chiba Medical CenterOkayamadai, Togane, Eastern Chiba Medical CenterOkayamadai, Togane, Chiba, Japan
| | - Atsuya Watanabe
- Department of Orthopaedic Surgery, Eastern Chiba Medical CenterOkayamadai, Togane,Eastern Chiba Medical CenterOkayamadai, Togane, Eastern Chiba Medical CenterOkayamadai, Togane, Chiba, Japan
| | - Kazuhisa Takahashi
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Inohana, Chuo-ku,Graduate School of Medicine, Chiba University, Inohana, Chuo-ku, Chiba, Japan
| | - Seiji Ohtori
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Inohana, Chuo-ku,Graduate School of Medicine, Chiba University, Inohana, Chuo-ku, Chiba, Japan
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Liu X, Tian W, Chen H, LoStracco TA, Zhang J, Li MY, Germin B, Wang HZ. Advanced Neuroimaging in the Evaluation of Spinal Cord Tumors and Tumor Mimics: Diffusion Tensor and Perfusion-Weighted Imaging. Semin Ultrasound CT MR 2016; 38:163-175. [PMID: 28347419 DOI: 10.1053/j.sult.2016.07.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Spinal cord tumors are an important component of pathologic diseases involving the spinal cord. Conventional magnetic resonance (MR) imaging only provides anatomical information. MR diffusion tensor imaging (DTI) and MR perfusion-weighted imaging (PWI) may detect microstructure diffusion and hemodynamic changes in these tumors. We review recent application studies of MR DTI and PWI in spinal cord tumors. Overall, MR DTI and MR PWI are promising imaging tools that are especially useful in improving differential diagnosis between spinal cord tumors and tumor mimics, preoperative evaluation of resectability, and providing assistance in surgical navigation.
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Affiliation(s)
- Xiang Liu
- Department of Imaging Sciences, University of Rochester Medical Center, Rochester, NY.
| | - Wei Tian
- Department of Imaging Sciences, University of Rochester Medical Center, Rochester, NY
| | - Hongyan Chen
- Department of Radiology, Beijing TiantanHospital, Beijing, China
| | - Thomas A LoStracco
- Department of Imaging Sciences, University of Rochester Medical Center, Rochester, NY
| | - Jing Zhang
- GE Healthcare MR research center, Beijing, China
| | - Michael Yan Li
- Department of Neurosurgery, University of Rochester Medical Center, Rochester, NY
| | - Barbara Germin
- (║)Department of Pathology, University of Rochester Medical Center, Rochester, NY
| | - Henry Z Wang
- Department of Imaging Sciences, University of Rochester Medical Center, Rochester, NY
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