1
|
Shimizu Y, Kobayashi Y, Sato Y, Tozuka H, Oda K, Watanabe KI. Neurolymphomatosis diagnosed after a recurrence of facial palsy. Auris Nasus Larynx 2024; 51:680-683. [PMID: 38704896 DOI: 10.1016/j.anl.2024.04.006] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 03/04/2024] [Accepted: 04/04/2024] [Indexed: 05/07/2024]
Abstract
Neurolymphomatosis (NL) is a rare complication of non-Hodgkin's lymphoma, characterized by the infiltration of lymphoma cells into the peripheral nerves. A 54-year-old woman initially presented with right facial palsy without any other significant symptoms and was diagnosed with Bell's palsy. Despite initial improvement, her condition recurred, prompting further evaluation. Magnetic resonance imaging (MRI) revealed contrast enhancement from the tympanic segment to the surface of the masseter muscle along the right facial nerve and an adjacent mass lesion. Biopsy of the mass revealed a diagnosis of T-cell/histiocyte-rich large B-cell lymphoma. Chemotherapy resulted in complete resolution of facial palsy. Follow-up MRI confirmed the absence of contrast enhancement along the facial nerve. Facial palsy was considered to be caused by NL. This case was classified as that of primary NL because the facial palsy was the first manifestation of a hematologic malignancy. Recurrent facial palsy, which is atypical in Bell's palsy, led to further evaluation with MRI, which finally resulted in the diagnosis of malignant lymphoma. In cases of recurrent facial palsy, clinicians should consider various diagnoses, including that of NL, and advocate early imaging tests and biopsy, if possible, for accurate diagnosis and improved outcomes.
Collapse
Affiliation(s)
- Yuichi Shimizu
- Department of Otolaryngology, Tohoku Rosai Hospital, 4-3-21 Dainohara, Aoba-ku, Sendai, Miyagi 981-8563, Japan.
| | - Yuta Kobayashi
- Department of Otolaryngology, Tohoku Rosai Hospital, 4-3-21 Dainohara, Aoba-ku, Sendai, Miyagi 981-8563, Japan
| | - Yuho Sato
- Department of Otolaryngology, Tohoku Rosai Hospital, 4-3-21 Dainohara, Aoba-ku, Sendai, Miyagi 981-8563, Japan
| | - Hiroki Tozuka
- Department of Otolaryngology, Tohoku Rosai Hospital, 4-3-21 Dainohara, Aoba-ku, Sendai, Miyagi 981-8563, Japan
| | - Kiyoshi Oda
- Department of Otolaryngology, Tohoku Rosai Hospital, 4-3-21 Dainohara, Aoba-ku, Sendai, Miyagi 981-8563, Japan
| | - Ken-Ichi Watanabe
- Department of Otolaryngology, Tohoku Rosai Hospital, 4-3-21 Dainohara, Aoba-ku, Sendai, Miyagi 981-8563, Japan
| |
Collapse
|
2
|
Yamamoto Y, Taiji R, Takewa M, Kitatsuji W, Okura A, Saito N, Ohyama N, Tachiiri T, Nishiofuku H, Itoh T, Marugami N, Tanaka T. Leydig cell tumor of the testis with characteristic contrast patterns of tumor and non-tumorous testicular parenchyma on MRI: a case report. Abdom Radiol (NY) 2023; 48:2477-2482. [PMID: 37165207 DOI: 10.1007/s00261-023-03932-y] [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: 01/18/2023] [Revised: 04/19/2023] [Accepted: 04/20/2023] [Indexed: 05/12/2023]
Abstract
PURPOSE Testicular Leydig cell tumor (LCT) is a rare subtype of testicular neoplasms that occurs in the interstitial tissue of testes, accounting for 1-3% of total testicular masses removed annually. We report a case of 70-year-old man diagnosed as testicular LCT. This report demonstrates a testicular LCT with intratumoral and non-tumorous testicular parenchymal enhancement in the affected testis, which should be considered characteristic findings of LCT. METHODS Ultrasonography showed a hypoechoic mass. On magnetic resonance imaging, the tumor showed low signal intensity comparable to the surrounding testicular tissue on T1-weighted images (T1WI) and low signal intensity on T2-weighted images (T2WI). On gadolinium contrast-enhanced T1WI (CE-T1WI), the tumor showed a rapid and marked wash-in and subsequent prolonged washout. The spared, non-tumorous testicular parenchyma showed slow and progressive enhancement in the early phase, which was as strong as or stronger than that of the mass in the delayed phase. The patient underwent right orchiectomy. RESULTS Pathologically, the tumor was diagnosed as a testicular Leydig cell tumor (LCT). Leydig cell proliferation was observed with well-developed microvessels, atrophy of the seminiferous tubules, and stromal edema in the non-tumorous testicular parenchyma. Leydig cells in the non-tumorous parenchyma were positive for estrogen receptors. CONCLUSION Since the contrast findings in the non-tumorous testicular parenchymal region on CE-T1WI likely match the histopathological features of LCT, our case suggests that the presence of non-tumorous testicular parenchymal enhancement on imaging might indicate a diagnosis of LCT.
Collapse
Affiliation(s)
- Yuji Yamamoto
- Department of Diagnostic and Interventional Radiology, Nara Medical University, 840, Shijo-Cho, Kashihara-City, Nara, 634-8522, Japan
- Department of Radiology, Nara Prefectural Seiwa Medical Center, 1-14-16, Mimuro, Ikoma-Gun, Sangou-Cho, Nara, 636-0802, Japan
| | - Ryosuke Taiji
- Department of Diagnostic and Interventional Radiology, Nara Medical University, 840, Shijo-Cho, Kashihara-City, Nara, 634-8522, Japan.
| | - Megumi Takewa
- Department of Radiology, Nara Prefectural Seiwa Medical Center, 1-14-16, Mimuro, Ikoma-Gun, Sangou-Cho, Nara, 636-0802, Japan
| | - Wataru Kitatsuji
- Department of Radiology, Nara Prefectural Seiwa Medical Center, 1-14-16, Mimuro, Ikoma-Gun, Sangou-Cho, Nara, 636-0802, Japan
| | - Akira Okura
- Department of Radiology, Nara Prefectural Seiwa Medical Center, 1-14-16, Mimuro, Ikoma-Gun, Sangou-Cho, Nara, 636-0802, Japan
| | - Naotoshi Saito
- Department of Pathology, Nara Prefectural Seiwa Medical Center, 1-14-16, Mimuro, Ikoma-Gun, Sangou-Cho, Nara, 636-0802, Japan
| | - Nobuo Ohyama
- Department of Urology, Nara Prefectural Seiwa Medical Center, 1-14-16, Mimuro, Ikoma-Gun, Sangou-Cho, Nara, 636-0802, Japan
| | - Tetsuya Tachiiri
- Department of Diagnostic and Interventional Radiology, Nara Medical University, 840, Shijo-Cho, Kashihara-City, Nara, 634-8522, Japan
| | - Hideyuki Nishiofuku
- Department of Diagnostic and Interventional Radiology, Nara Medical University, 840, Shijo-Cho, Kashihara-City, Nara, 634-8522, Japan
| | - Takahiro Itoh
- Department of Diagnostic and Interventional Radiology, Nara Medical University, 840, Shijo-Cho, Kashihara-City, Nara, 634-8522, Japan
| | - Nagaaki Marugami
- Department of Diagnostic and Interventional Radiology, Nara Medical University, 840, Shijo-Cho, Kashihara-City, Nara, 634-8522, Japan
| | - Toshihiro Tanaka
- Department of Diagnostic and Interventional Radiology, Nara Medical University, 840, Shijo-Cho, Kashihara-City, Nara, 634-8522, Japan
| |
Collapse
|
3
|
Chen D, Yang S, Chen J, Li T, Liu Y, Zhao X, Zhang T, Xu M, Wang H, Zhao K, Su X. Comparison of [ 18F]-OC PET/CT and contrast-enhanced CT/MRI in the detection and evaluation of neuroendocrine neoplasms. Eur J Nucl Med Mol Imaging 2023; 50:2420-2431. [PMID: 36971805 DOI: 10.1007/s00259-023-06200-9] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Accepted: 03/14/2023] [Indexed: 03/29/2023]
Abstract
OBJECTIVES Gallium-68 (68Ga)-labeled somatostatin analog (SSA) PET imaging has been widely used in clinical practice of neuroendocrine neoplasms (NENs). Compared with 68Ga, 18F has a great practical and economic advantage. Although a few studies have shown the characteristics of [18F] AlF-NOTA-octreotide ([18F]-OC) in healthy volunteers and small NEN patient groups, its clinical value needs further investigation. Herein, this retrospective study aimed to evaluate the diagnostic accuracy of [18F]-OC PET/CT in detecting NENs, as well as to compare it with contrast-enhanced CT/MRI. METHODS We retrospectively reviewed the data of 93 patients who had undergone [18F]-OC PET/CT and CT or MRI scans. Of these patients, there were 45 patients with suspected NENs for diagnostic evaluation, and 48 patients with pathologically confirmed NENs for detecting metastasis or recurrence. [18F]-OC PET/CT images were evaluated visually and semi-quantitatively by measuring maximum standardized uptake value of tumor (SUVmax), tumor-to-background SUVmax ratio (TBR), and SUVmax of hypophysis (SUVhypophysis). A total of 276 suspected NEN lesions were found in these 93 patients. The results of histopathology or radiographic follow-up served as the reference standard for the final diagnosis. RESULTS Forty-five patients with suspected NENs were confirmed by histopathological examination via resection or biopsy. [18F]-OC PET/CT showed high radiotracer uptake in the lesions of G1-G3 NENs. [18F]-OC PET/CT showed superior performance with 96.3% of sensitivity, 77.8% of specificity, and 88.9% of accuracy in diagnosing NENs compared to CT/MRI. When cutoffs of SUVmax, TBR, and SUVhypophysis were 8.3, 3.1, and 15.4, [18F]-OC PET/CT had the best equilibrium between sensitivity and specificity for differentiating NEN from non-NEN lesions. For a total of 276 suspected NEN lesions, the sensitivity, specificity, and accuracy of [18F]-OC PET/CT for diagnosis of NENs were 90.5%, 82.1%, and 88.8%, respectively, and were higher than those of CT and MRI. G1 and G2 NENs had higher TBR and lower CT enhancement intensity than G3. The SUVmax and TBR had a positive correlation with CT enhancement intensity in G2 rather than in G1 or G3. CONCLUSIONS [18F]-OC PET/CT is a promising imaging modality for initial diagnosis and detecting metastasis or postoperative recurrence in NENs.
Collapse
Affiliation(s)
- Donghe Chen
- Department of Nuclear Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Road, Hangzhou, 310003, People's Republic of China
| | - Shuye Yang
- Department of Nuclear Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Road, Hangzhou, 310003, People's Republic of China
| | - Jingjing Chen
- Pharmacy Intravenous Admixture Services (PIVAS), The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, People's Republic of China
| | - Tiancheng Li
- Department of Nuclear Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Road, Hangzhou, 310003, People's Republic of China
| | - Yinuo Liu
- Department of Nuclear Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Road, Hangzhou, 310003, People's Republic of China
| | - Xin Zhao
- Department of Nuclear Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Road, Hangzhou, 310003, People's Republic of China
| | - Tingting Zhang
- Department of Nuclear Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Road, Hangzhou, 310003, People's Republic of China
| | - Mimi Xu
- Department of Nuclear Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Road, Hangzhou, 310003, People's Republic of China
| | - Huatao Wang
- Department of Nuclear Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Road, Hangzhou, 310003, People's Republic of China
| | - Kui Zhao
- Department of Nuclear Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Road, Hangzhou, 310003, People's Republic of China.
| | - Xinhui Su
- Department of Nuclear Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Road, Hangzhou, 310003, People's Republic of China.
| |
Collapse
|
4
|
Zhao K, Zhu X, Zhang M, Xie Z, Yan X, Wu S, Liao P, Lu H, Shen W, Fu C, Cui H, He C, Fang Q, Mei J. Radiologists with assistance of deep learning can achieve overall accuracy of benign-malignant differentiation of musculoskeletal tumors comparable with that of pre-surgical biopsies in the literature. Int J Comput Assist Radiol Surg 2023:10.1007/s11548-023-02838-w. [PMID: 36653517 DOI: 10.1007/s11548-023-02838-w] [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: 07/18/2022] [Accepted: 01/09/2023] [Indexed: 01/19/2023]
Abstract
PURPOSE The purpose of this study was to assess if radiologists assisted by deep learning (DL) algorithms can achieve diagnostic accuracy comparable to that of pre-surgical biopsies in benign-malignant differentiation of musculoskeletal tumors (MST). METHODS We first conducted a systematic review of literature to get the respective overall diagnostic accuracies of fine-needle aspiration biopsy (FNAB) and core needle biopsy (CNB) in differentiating between benign and malignant MST, by synthesizing data from the articles meeting our inclusion criteria. To compared against the accuracies reported in literature, we then invited 4 radiologists, respectively with 2 (A), 6 (B), 7 (C), and 33 (D) years of experience in interpreting musculoskeletal MRI to perform diagnostic tests on our own dataset (n = 62), with and without assistance of a previously developed DL algorithm. The gold standard for benign-malignant differentiation was histopathologic confirmation or clinical/radiographic follow-up. RESULTS For FNAB, a meta-analysis containing 4604 samples met the inclusion criteria, with the overall diagnostic accuracy reported to be 0.77. For CNB, an overall accuracy of 0.86 was derived by synthesizing results from 7 original research articles containing a total of 587 samples. On our internal MST dataset, the invited radiologists, respectively, achieved diagnostic accuracies of 0.84 (A), 0.89 (B), 0.87 (C), and 0.90 (D), with the assistance of DL. CONCLUSION Use of DL algorithms on musculoskeletal dynamic contrast-enhanced MRI improved the benign-malignant differentiation accuracy of radiologists to a level comparable to that of pre-surgical biopsies. The developed DL algorithms have a potential to lower the risk of miss-diagnosing malignancy in radiological practice.
Collapse
Affiliation(s)
- Keyang Zhao
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, No. 600 Yishan Road, Shanghai, 200233, China
| | - Xiaozhong Zhu
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, No. 600 Yishan Road, Shanghai, 200233, China
| | - Mingzi Zhang
- Shanghai Aitrox Technology Corporation Limited, Shanghai, China
| | - Zhaozhi Xie
- Department of Computer Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200233, China
| | - Xu Yan
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, No. 600 Yishan Road, Shanghai, 200233, China
| | - Shenghui Wu
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, No. 600 Yishan Road, Shanghai, 200233, China
| | - Peng Liao
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, No. 600 Yishan Road, Shanghai, 200233, China
| | - Hongtao Lu
- Department of Computer Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200233, China
| | - Wei Shen
- MoE Key Lab of Artificial Intelligence, AI Institute, Shanghai Jiao Tong University, Shanghai, 200233, China
| | - Chicheng Fu
- Shanghai Aitrox Technology Corporation Limited, Shanghai, China
| | - Haoyang Cui
- Shanghai Aitrox Technology Corporation Limited, Shanghai, China
| | - Chuan He
- Shanghai Aitrox Technology Corporation Limited, Shanghai, China
| | - Qu Fang
- Shanghai Aitrox Technology Corporation Limited, Shanghai, China
| | - Jiong Mei
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, No. 600 Yishan Road, Shanghai, 200233, China.
| |
Collapse
|
5
|
Wright C, Mäkelä P, Bigot A, Anttinen M, Boström PJ, Blanco Sequeiros R. Deep learning prediction of non-perfused volume without contrast agents during prostate ablation therapy. Biomed Eng Lett 2022; 13:31-40. [PMID: 36711157 PMCID: PMC9873841 DOI: 10.1007/s13534-022-00250-y] [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] [Received: 07/06/2022] [Revised: 09/29/2022] [Accepted: 10/22/2022] [Indexed: 11/09/2022] Open
Abstract
The non-perfused volume (NPV) is an important indicator of treatment success immediately after prostate ablation. However, visualization of the NPV first requires an injection of MRI contrast agents into the bloodstream, which has many downsides. Purpose of this study was to develop a deep learning model capable of predicting the NPV immediately after prostate ablation therapy without the need for MRI contrast agents. A modified 2D deep learning UNet model was developed to predict the post-treatment NPV. MRI imaging data from 95 patients who had previously undergone prostate ablation therapy for treatment of localized prostate cancer were used to train, validate, and test the model. Model inputs were T1/T2-weighted and thermometry MRI images, which were always acquired without any MRI contrast agents and prior to the final NPV image on treatment-day. Model output was the predicted NPV. Model accuracy was assessed using the Dice-Similarity Coefficient (DSC) by comparing the predicted to ground truth NPV. A radiologist also performed a qualitative assessment of NPV. Mean (std) DSC score for predicted NPV was 85% ± 8.1% compared to ground truth. Model performance was significantly better for slices with larger prostate radii (> 24 mm) and for whole-gland rather than partial ablation slices. The predicted NPV was indistinguishable from ground truth for 31% of images. Feasibility of predicting NPV using a UNet model without MRI contrast agents was clearly established. If developed further, this could improve patient treatment outcomes and could obviate the need for contrast agents altogether. Trial Registration Numbers Three studies were used to populate the data: NCT02766543, NCT03814252 and NCT03350529. Supplementary Information The online version contains supplementary material available at 10.1007/s13534-022-00250-y.
Collapse
Affiliation(s)
- Cameron Wright
- Department of Urology, University of Turku and Turku University Hospital, Turku, Finland ,Department of Diagnostic Radiology, University of Turku and Turku University Hospital, Turku, Finland
| | - Pietari Mäkelä
- Department of Diagnostic Radiology, University of Turku and Turku University Hospital, Turku, Finland
| | | | - Mikael Anttinen
- Department of Urology, University of Turku and Turku University Hospital, Turku, Finland
| | - Peter J. Boström
- Department of Urology, University of Turku and Turku University Hospital, Turku, Finland
| | - Roberto Blanco Sequeiros
- Department of Diagnostic Radiology, University of Turku and Turku University Hospital, Turku, Finland
| |
Collapse
|
6
|
Grand T, Hermann AL, Gérard M, Arama E, Ouerd L, Garrouche N, Rocher L. Precocious puberty related to Leydig cell testicular tumor: the diagnostic imaging keys. Eur J Med Res 2022; 27:67. [PMID: 35550623 PMCID: PMC9097322 DOI: 10.1186/s40001-022-00692-1] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Accepted: 04/23/2022] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND We report the challenging case of a 6-year-old boy with precocious puberty related to histologically proven Leydig cell tumor. CASE PRESENTATION Multiparametric ultrasound and magnetic resonance imaging (MRI) was performed. Interesting findings were scarcely or never reported in children and differed from adults Leydig cell tumors s such as the hyperechogenic halo surrounding the lesion and the dominant central vascularization using ultrasensitive Doppler. MRI revealed an enlarged testicle with strong enhancement of a tumor, a tumor apparent diffusion coefficient (ADC) of 600 × 10-3 mm2/s and a lower ADC value of the non-tumor parenchyma compared to the contralateral testis (ADC = 800 × 10-3 mm2/s vs 1100 × 10-3 mm2/s), attributed to the spermatogenesis induced by hormonal impregnation. CONCLUSION We illustrate multiparametric US and MRI findings of a pediatric Leydig cell tumor, including the imaging changes attributed to local hormone secretion, which may be helpful in similar cases.
Collapse
Affiliation(s)
- Téodor Grand
- Service de Radiologie, APHP Hôpitaux Paris Saclay, Hôpital Antoine Béclère, 157 rue de la porte de trivaux, 92140, Clamart, France
| | | | - Maxime Gérard
- Service de Pédiatrie, Armand Trousseau Hospital, Paris, France
| | - Emmanuel Arama
- Service de Radiologie, APHP Hôpitaux Paris Saclay, Hôpital Antoine Béclère, 157 rue de la porte de trivaux, 92140, Clamart, France
- Université Paris Saclay, 63 rue Gabriel Péri, 94270, Le Kremlin-Bicêtre, France
| | - Linda Ouerd
- Service de Radiologie, APHP Hôpitaux Paris Saclay, Hôpital Antoine Béclère, 157 rue de la porte de trivaux, 92140, Clamart, France
| | - Nada Garrouche
- Service de Radiologie, APHP Hôpitaux Paris Saclay, Hôpital Antoine Béclère, 157 rue de la porte de trivaux, 92140, Clamart, France
| | - Laurence Rocher
- Service de Radiologie, APHP Hôpitaux Paris Saclay, Hôpital Antoine Béclère, 157 rue de la porte de trivaux, 92140, Clamart, France.
- Université Paris Saclay, 63 rue Gabriel Péri, 94270, Le Kremlin-Bicêtre, France.
- BIOMAPS, IR4M, UMR8081, 4, place du Général Leclerc, 91401, Orsay cedex, France.
| |
Collapse
|
7
|
Polikoff A, Wessner CE, Balasubramanya R, Dulka S, Liu JB, Machado P, Savsani E, Lyshchik A, Shaw CM, Eisenbrey JR. Imaging appearance of residual HCC following incomplete trans-arterial chemoembolization on contrast-enhanced imaging. Abdom Radiol (NY) 2022; 47:152-60. [PMID: 34643782 DOI: 10.1007/s00261-021-03298-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 09/24/2021] [Accepted: 09/27/2021] [Indexed: 10/20/2022]
Abstract
PURPOSE The aim of this study was to describe changes in contrast agent kinetics in HCC following incomplete trans-arterial chemoembolization (TACE) on contrast-enhanced ultrasound (CEUS) and MRI/CT. METHODS Patients with residual HCC proven by biopsy, retreatment angiography, or 4-8 month MRI demonstrating tumor progression were identified. Pre-treatment and 4-6-week follow-up CE-MRI/CT and CEUS exams were collected for blinded reads by two experienced readers for each modality to evaluate arterial phase hyper-enhancement (APHE) and washout within the residual HCC. A third reader provided tie-breaking decisions for any disagreements. RESULTS Contrast-enhanced imaging data were collected from 29 patients with residual HCC post-TACE. On CEUS, 84.2% of patients with baseline APHE demonstrated APHE post-TACE (p = 0.25). On CE-MRI/CT, 57.1% of patients with baseline APHE later demonstrated APHE (p = 0.004). As for washout, on CEUS 33.3% of patients with baseline washout retained washout post-TACE (p = 0.01), while on CE-MRI/CT only 18.8% of patients with baseline washout later demonstrated washout (p < 0.001). Among CEUS readers, reader agreement was 100% for baseline APHE, 66.7% for baseline washout (K = 0.35), 84.2% for post-TACE APHE (K = 0.35), and 57.9% for post-TACE washout (K = - 0.09). On CE-MRI/CT, reader agreement was 65.5% for baseline APHE (K = 0.19), 55.2% for baseline washout (K = 0.12), 48.3% for post-TACE APHE (K = - 0.07), and 58.6% for post-TACE washout (K = 0.04). CONCLUSION Common diagnostic features of treatment-naïve HCC like APHE and washout can be substantially altered by TACE and should be considered when diagnosing residual disease on contrast-enhanced imaging.
Collapse
|
8
|
Tsuyoshi H, Tsujikawa T, Yamada S, Okazawa H, Yoshida Y. Diagnostic value of 18F-FDG PET/MRI for staging in patients with endometrial cancer. Cancer Imaging 2020; 20:75. [PMID: 33092631 PMCID: PMC7584088 DOI: 10.1186/s40644-020-00357-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [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: 02/10/2020] [Accepted: 10/15/2020] [Indexed: 12/05/2022] Open
Abstract
Background Preoperative accurate assessment of endometrial cancer can assist in the planning of additional surgical options, and in predicting the prognosis. The aim of the present study was to evaluate the diagnostic potential of non-contrast PET/MRI with 18F-fluorodeoxyglucose (18F-FDG) for assessment in preoperative staging of endometrial cancer. Methods Thirty-six patients with biopsy-proven endometrial cancer underwent preoperative 18F-FDG PET/MRI, contrast-enhanced CT (ceCT) and pelvic dynamic contrast-enhanced MRI (ceMRI) for initial staging. The diagnostic performance of 18F-FDG PET/MRI and ceMRI for assessing the extent of the primary tumor (T stage), and 18F-FDG PET/MRI and ceCT for assessing nodal (N stage) and distant (M stage) metastasis, was evaluated by two experienced readers. Histopathological and follow-up imaging results were used as the gold standard. The McNemar test was employed for statistical analysis. Results Accuracy for T status was 77.8 and 75.0% for 18F-FDG PET/MRI and ceMRI, respectively. Patient-based accuracy for detecting regional nodal and distant metastasis was 91.3 and 81.8% for 18F-FDG PET/MRI, and 87.0 and 81.8% for ceCT. None of these parameters was statistically significant (p > 0.05). Lesion-based sensitivity, specificity and accuracy for detecting regional nodal metastasis were 100, 96.9 and 97.0% for 18F-FDG PET/MRI, and 14.3, 97.6 and 93.3% for ceCT; sensitivity was statistically significant (p < 0.05). Conclusions Non-contrast 18F-FDG PET/MRI, which combines the individual advantages of PET and MRI, offers a high diagnostic value equivalent to that of ceMRI for assessment of the primary tumor, and equivalent to that of ceCT for the assessment of nodal and distant metastatic staging, in patients with endometrial cancer. These findings suggest that 18F-FDG PET/MRI might provide an alternative diagnostic strategy to conventional imaging modalities in the preoperative staging of endometrial cancer. Supplementary information Supplementary information accompanies this paper at 10.1186/s40644-020-00357-4.
Collapse
Affiliation(s)
- Hideaki Tsuyoshi
- Department of Obstetrics and Gynecology, University of Fukui, 23-3 Matsuoka-Shimoaizuki, Eiheiji-cho, Yoshida-gun, Fukui, 910-1193, Japan.
| | - Tetsuya Tsujikawa
- Biomedical Imaging Research Center, University of Fukui, Fukui, Japan
| | - Shizuka Yamada
- Department of Obstetrics and Gynecology, University of Fukui, 23-3 Matsuoka-Shimoaizuki, Eiheiji-cho, Yoshida-gun, Fukui, 910-1193, Japan
| | - Hidehiko Okazawa
- Biomedical Imaging Research Center, University of Fukui, Fukui, Japan
| | - Yoshio Yoshida
- Department of Obstetrics and Gynecology, University of Fukui, 23-3 Matsuoka-Shimoaizuki, Eiheiji-cho, Yoshida-gun, Fukui, 910-1193, Japan
| |
Collapse
|
9
|
Tsuyoshi H, Tsujikawa T, Yamada S, Okazawa H, Yoshida Y. Diagnostic value of [ 18F]FDG PET/MRI for staging in patients with ovarian cancer. EJNMMI Res 2020; 10:117. [PMID: 33006685 DOI: 10.1186/s13550-020-00712-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 09/24/2020] [Indexed: 12/20/2022] Open
Abstract
Purpose To evaluate the diagnostic potential of PET/MRI with 2-[18F]fluoro-2-deoxy-d-glucose ([18F]FDG) in ovarian cancer. Materials and methods Participants comprised 103 patients with suspected ovarian cancer underwent pretreatment [18F]FDG PET/MRI, contrast-enhanced CT (ceCT) and pelvic dynamic contrast-enhanced MRI (ceMRI). Diagnostic performance of [18F]FDG PET/MRI and ceMRI for assessing the characterization and the extent of the primary tumor (T stage) and [18F]FDG PET/MRI and ceCT for assessing nodal (N stage) and distant (M stage) metastases was evaluated by two experienced readers. Histopathological and follow-up imaging results were used as the gold standard. The McNemar test was employed for statistical analysis. Results Accuracy for the characterization of suspected ovarian cancer was significantly better for [18F]FDG PET/MRI (92.5%) [95% confidence interval (CI) 0.84–0.95] than for ceMRI (80.6%) (95% CI 0.72–0.83) (p < 0.05). Accuracy for T status was 96.4% (95% CI 0.96–0.96) and 92.9% (95% CI 0.93–0.93) for [18F]FDG PET/MRI and ceMRI/ceCT, respectively. Patient-based accuracies for N and M status were 100% (95% CI 0.88–1.00) and 100% (95% CI 0.88–1.00) for [18F]FDG PET/MRI and 85.2% (95% CI 0.76–0.85) and 30.8% (95% CI 0.19–0.31) for ceCT and M staging representing significant differences (p < 0.01). Lesion-based sensitivity, specificity and accuracy for N status were 78.6% (95% CI 0.57–0.91), 95.7% (95% CI 0.93–0.97) and 93.9% (95% CI 0.89–0.97) for [18F]FDG PET/MRI and 42.9% (95% CI 0.24–0.58), 96.6% (95% CI 0.94–0.98) and 90.8% (95% CI 0.87–0.94) for ceCT. Conclusions [18F]FDG PET/MRI offers better sensitivity and specificity for the characterization and M staging than ceMRI and ceCT, and diagnostic value for T and N staging equivalent to ceMRI and ceCT, suggesting that [18F]FDG PET/MRI might represent a useful diagnostic alternative to conventional imaging modalities in ovarian cancer.
Collapse
|
10
|
Ma D, Cardoso MJ, Zuluaga MA, Modat M, Powell NM, Wiseman FK, Cleary JO, Sinclair B, Harrison IF, Siow B, Popuri K, Lee S, Matsubara JA, Sarunic MV, Beg MF, Tybulewicz VLJ, Fisher EMC, Lythgoe MF, Ourselin S. Substantially thinner internal granular layer and reduced molecular layer surface in the cerebellar cortex of the Tc1 mouse model of down syndrome - a comprehensive morphometric analysis with active staining contrast-enhanced MRI. Neuroimage 2020; 223:117271. [PMID: 32835824 PMCID: PMC8417772 DOI: 10.1016/j.neuroimage.2020.117271] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 08/03/2020] [Accepted: 08/10/2020] [Indexed: 12/18/2022] Open
Abstract
Down Syndrome is a chromosomal disorder that affects the development of cerebellar cortical lobules. Impaired neurogenesis in the cerebellum varies among different types of neuronal cells and neuronal layers. In this study, we developed an imaging analysis framework that utilizes gadolinium-enhanced ex vivo mouse brain MRI. We extracted the middle Purkinje layer of the mouse cerebellar cortex, enabling the estimation of the volume, thickness, and surface area of the entire cerebellar cortex, the internal granular layer, and the molecular layer in the Tc1 mouse model of Down Syndrome. The morphometric analysis of our method revealed that a larger proportion of the cerebellar thinning in this model of Down Syndrome resided in the inner granule cell layer, while a larger proportion of the surface area shrinkage was in the molecular layer.
Collapse
Affiliation(s)
- Da Ma
- Department of Medical Physics and Biomedical Engineering, University College London, United Kingdom; Centre for Advanced Biomedical Imaging, University College London, United Kingdom; School of Engineering Science, Simon Fraser University, Burnaby, Canada.
| | - Manuel J Cardoso
- Department of Medical Physics and Biomedical Engineering, University College London, United Kingdom; School of Biomedical Engineering & Imaging Sciences, King's College London, United Kingdom
| | - Maria A Zuluaga
- Department of Medical Physics and Biomedical Engineering, University College London, United Kingdom; Data Science Department, EURECOM, France
| | - Marc Modat
- Department of Medical Physics and Biomedical Engineering, University College London, United Kingdom; School of Biomedical Engineering & Imaging Sciences, King's College London, United Kingdom
| | - Nick M Powell
- Department of Medical Physics and Biomedical Engineering, University College London, United Kingdom; Centre for Advanced Biomedical Imaging, University College London, United Kingdom
| | - Frances K Wiseman
- UK Dementia Research Institute at University College London, UK London; Down Syndrome Consortium (LonDownS), London, United Kingdom
| | - Jon O Cleary
- Centre for Advanced Biomedical Imaging, University College London, United Kingdom; Department of Radiology, Guy´s and St Thomas' NHS Foundation Trust, United Kingdom; Melbourne Brain Centre Imaging Unit, Department of Medicine and Radiology, University of Melbourne, Melbourne, Australia
| | - Benjamin Sinclair
- Centre for Advanced Biomedical Imaging, University College London, United Kingdom
| | - Ian F Harrison
- Centre for Advanced Biomedical Imaging, University College London, United Kingdom
| | - Bernard Siow
- Centre for Advanced Biomedical Imaging, University College London, United Kingdom; The Francis Crick Institute, London, United Kingdom
| | - Karteek Popuri
- School of Engineering Science, Simon Fraser University, Burnaby, Canada
| | - Sieun Lee
- School of Engineering Science, Simon Fraser University, Burnaby, Canada
| | - Joanne A Matsubara
- Department of Ophthalmology & Visual Science, University of British Columbia, Vancouver, Canada
| | - Marinko V Sarunic
- School of Engineering Science, Simon Fraser University, Burnaby, Canada
| | - Mirza Faisal Beg
- School of Engineering Science, Simon Fraser University, Burnaby, Canada
| | - Victor L J Tybulewicz
- The Francis Crick Institute, London, United Kingdom; Department of Immunology and Inflammation, Imperial College, London, United Kingdom
| | | | - Mark F Lythgoe
- Centre for Advanced Biomedical Imaging, University College London, United Kingdom
| | - Sebastien Ourselin
- Department of Medical Physics and Biomedical Engineering, University College London, United Kingdom; School of Biomedical Engineering & Imaging Sciences, King's College London, United Kingdom
| |
Collapse
|
11
|
Song S, Cheng Y, Ma J, Wang L, Dong C, Wei Y, Xu G, An Y, Qi Z, Lin Q, Lu J. Simultaneous FET-PET and contrast-enhanced MRI based on hybrid PET/MR improves delineation of tumor spatial biodistribution in gliomas: a biopsy validation study. Eur J Nucl Med Mol Imaging 2020; 47:1458-1467. [PMID: 31919633 PMCID: PMC7188715 DOI: 10.1007/s00259-019-04656-2] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [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: 10/25/2019] [Accepted: 12/09/2019] [Indexed: 12/17/2022]
Abstract
Purpose Glioma treatment planning requires precise tumor delineation, which is typically performed with contrast-enhanced (CE) MRI. However, CE MRI fails to reflect the entire extent of glioma. O-(2-18F-fluoroethyl)-L-tyrosine (18F-FET) PET may detect tumor volumes missed by CE MRI. We investigated the clinical value of simultaneous FET-PET and CE MRI in delineating tumor extent before treatment planning. Guided stereotactic biopsy was used to validate the findings. Methods Conventional MRI and 18F-FET PET were performed simultaneously on a hybrid PET/MR in 33 patients with histopathologically confirmed glioma. Tumor volumes were quantified using a tumor-to-brain ratio ≥ 1.6 (VPET) and a visual threshold (VCE). We visually assessed abnormal areas on FLAIR images and calculated Dice’s coefficient (DSC), overlap volume (OV), discrepancy-PET, and discrepancy-CE. Additionally, several stereotactic biopsy samples were taken from “matched” or “mismatched” FET-PET and CE MRI regions. Results Among 31 patients (93.94%), FET-PET delineated significantly larger tumor volumes than CE MRI (77.84 ± 51.74 cm3 vs. 34.59 ± 27.07 cm3, P < 0.05). Of the 21 biopsy samples obtained from regions with increased FET uptake, all were histopathologically confirmed as glioma tissue or tumor infiltration, whereas only 13 showed enhancement on CE MRI. Among all patients, the spatial similarity between VPET and VCE was low (average DSC 0.56 ± 0.22), while the overlap was high (average OV 0.95 ± 0.08). The discrepancy-CE and discrepancy-PET were lower than 10% in 28 and 0 patients, respectively. Eleven patients showed VPET partially beyond abnormal signal areas on FLAIR images. Conclusion The metabolically active biodistribution of gliomas delineated with FET-PET significantly exceeds tumor volume on CE MRI, and histopathology confirms these findings. Our preliminary results indicate that combining the anatomic and molecular information obtained from conventional MRI and FET-PET would reveal a more accurate glioma extent, which is critical for individualized treatment planning. Electronic supplementary material The online version of this article (10.1007/s00259-019-04656-2) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Shuangshuang Song
- Department of Radiology, Xuanwu Hospital, Capital medical University, Beijing, China.,Beijing Key Laboratory of Magnetic Resonance Imaging and Brain Informatics, Beijing, China
| | - Ye Cheng
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Jie Ma
- Department of Nuclear Medicine, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Leiming Wang
- Department of Pathology, Xuanwu Hospital, Capital Medical University, Beijing, China
| | | | - Yukui Wei
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Geng Xu
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Yang An
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Zhigang Qi
- Department of Radiology, Xuanwu Hospital, Capital medical University, Beijing, China.,Beijing Key Laboratory of Magnetic Resonance Imaging and Brain Informatics, Beijing, China
| | - Qingtang Lin
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China.
| | - Jie Lu
- Department of Radiology, Xuanwu Hospital, Capital medical University, Beijing, China. .,Beijing Key Laboratory of Magnetic Resonance Imaging and Brain Informatics, Beijing, China. .,Department of Nuclear Medicine, Xuanwu Hospital, Capital Medical University, Beijing, China.
| |
Collapse
|
12
|
Ishijima K, Shinmei Y, Nozaki M, Yamaguchi S, Chin S, Ishida S. Sudden bilateral vision loss due to third ventricular cavernous angioma with intratumoral hemorrhage - case report. BMC Ophthalmol 2019; 19:259. [PMID: 31842792 PMCID: PMC6916187 DOI: 10.1186/s12886-019-1252-5] [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: 06/19/2019] [Accepted: 11/21/2019] [Indexed: 11/25/2022] Open
Abstract
Background We report a rare case of sudden bilateral vision loss due to third ventricular cavernous angioma with intratumoral hemorrhage. Case presentation A 45-year-old woman presented decreased visual acuity in both eyes. Her best corrected visual acuity was 0.1 in the right eye and 0.15 in the left eye. Goldmann perimetry showed bilateral central scotomas and bitemporal visual field defects. MRI demonstrated a lesion with mixed hypo- and hyperintensity at the optic chiasm, which was thought to be an intratumoral hemorrhage. The patient underwent bifrontal craniotomy. The tumor was exposed via an anterior interhemispheric approach, and histological evaluation of the mass led to a diagnosis of cavernous angioma. Six months after the surgery, her best corrected visual acuity was 0.9 in the right eye and 0.9 in the left, with slight bitemporal visual field defects. Conclusion Third ventricular cavernous angioma is considered in the differential diagnosis of chiasmal syndrome. Contrast-enhanced MRI and FDG-PET might be useful for differential diagnosis of cavernous angioma from other chiasmal tumors including glioblastoma.
Collapse
Affiliation(s)
- Kan Ishijima
- Department of Ophthalmology, Hokkaido University Graduate School of Medicine, North 15, West 7, Kita-ku, Sapporo, 060-8638, Japan
| | - Yasuhiro Shinmei
- Department of Ophthalmology, Hokkaido University Graduate School of Medicine, North 15, West 7, Kita-ku, Sapporo, 060-8638, Japan.
| | | | - Shigeru Yamaguchi
- Department of Neurosurgery, Faculty of Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Shinki Chin
- Department of Ophthalmology, Hokkaido University Graduate School of Medicine, North 15, West 7, Kita-ku, Sapporo, 060-8638, Japan
| | - Susumu Ishida
- Department of Ophthalmology, Hokkaido University Graduate School of Medicine, North 15, West 7, Kita-ku, Sapporo, 060-8638, Japan
| |
Collapse
|
13
|
Malek M, Rahmani M, Seyyed Ebrahimi SM, Tabibian E, Alidoosti A, Rahimifar P, Akhavan S, Gandomkar Z. Investigating the diagnostic value of quantitative parameters based on T2-weighted and contrast-enhanced MRI with psoas muscle and outer myometrium as internal references for differentiating uterine sarcomas from leiomyomas at 3T MRI. Cancer Imaging 2019; 19:20. [PMID: 30935419 PMCID: PMC6444554 DOI: 10.1186/s40644-019-0206-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [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: 03/08/2018] [Accepted: 03/15/2019] [Indexed: 01/13/2023] Open
Abstract
Background Post-hysterectomy histopathological examination is currently the main diagnostic tool for differentiating uterine sarcomas from leiomyomas. This study aimed to investigate the diagnostic accuracy of preoperative quantitative metrics based on T2-weighted sequences and contrast-enhanced MRI (CE-MRI) for distinguishing uterine sarcomas from leiomyomas. Materials and methods The institutional review board approved the study. Sixty-five women confirmed to have a total of 105 lesions participated. Routine pelvic MRI sequences, T2 map and CE-MRI images were performed preoperatively using a 3 T MR scanner. Six quantitative metrics—T2 mapping parameter, T2 scaled ratio, tumor myometrium contrast ratio on T2, tumor psoas contrast ratio on T2, tumor myometrium contrast-enhanced ratio, and tumor psoas contrast-enhanced ratio—were extracted from the acquired image sets. Chi-square test was used to compare the percentage of malignant lesions with the central necrosis to the corresponding percentage for the benign masses. Using the area under receiver operating characteristic (AUC) curve, the performance of different metrics for distinguishing uterine sarcomas from leiomyomas was measured. Moreover, for each metric, we extracted the optimal cut-off value. The values of sensitivity, specificity, negative predictive value, and positive predictive value were calculted for the classifiers based on different metrics. Results The average age, average lesion size, and proportion of premenopausal women in benign and malignant groups were comparable in our dataset. The signal intensity of uterine sarcomas at T2-weighted sequences was significantly higher than that of leiomyomas (p < 0.001), while intensity at T1-weighted sequences exhibited no significant difference between the two masses (p = 0.201). Our data also suggested that a central necrosis was ten times more common among malignant lesions compared to benign ones (p < 0.001). Among different metrics, T2 mapping parameter achieved the highest AUC value and accuracy in differentiating two groups. Three measures—T2 scaled ratio, tumor myometrium contrast ratio on T2, and tumor myometrium contrast-enhanced ratio—achieved a sensitivity of 100%, therefore none of the malignant lesions would have been missed if these metrics had been adopted in patient management. Conclusions The findings suggested that the evaluated metrics could be useful in the preoperative assessment of myometrial masses to differentiate uterine sarcomas from leiomyomas. The proposed framework has major implications for improving current practice in the management of myometrial masses.
Collapse
Affiliation(s)
- Mahrooz Malek
- Department of Radiology, Medical Imaging Center, Imam Khomeini Hospital Complex (IKHC), Tehran University of Medical Sciences (TUMS), End of Keshavarz Blvd, Tehran, 1419733141, Iran
| | - Maryam Rahmani
- Department of Radiology, Medical Imaging Center, Imam Khomeini Hospital Complex (IKHC), Tehran University of Medical Sciences (TUMS), End of Keshavarz Blvd, Tehran, 1419733141, Iran
| | - Seyyedeh Mahdieh Seyyed Ebrahimi
- Department of Radiology, Medical Imaging Center, Imam Khomeini Hospital Complex (IKHC), Tehran University of Medical Sciences (TUMS), End of Keshavarz Blvd, Tehran, 1419733141, Iran.
| | - Elnaz Tabibian
- Department of Radiology, Medical Imaging Center, Imam Khomeini Hospital Complex (IKHC), Tehran University of Medical Sciences (TUMS), End of Keshavarz Blvd, Tehran, 1419733141, Iran
| | - Azadeh Alidoosti
- Department of Radiology, Medical Imaging Center, Imam Khomeini Hospital Complex (IKHC), Tehran University of Medical Sciences (TUMS), End of Keshavarz Blvd, Tehran, 1419733141, Iran
| | - Pariya Rahimifar
- Department of Radiology, Medical Imaging Center, Imam Khomeini Hospital Complex (IKHC), Tehran University of Medical Sciences (TUMS), End of Keshavarz Blvd, Tehran, 1419733141, Iran
| | - Setareh Akhavan
- Department of Obstetrics and Gynecology, Tehran University of Medical Sciences (TUMS), Tehran, Iran
| | - Ziba Gandomkar
- The University of Sydney, Discipline of Medical Imaging and Radiation Sciences, Image Optimisation and Perception Group (MIOPeG), Sydney, NSW, Australia
| |
Collapse
|
14
|
Zhu W, Mai G, Zhou X, Song B. Double contrast-enhanced ultrasound improves the detection and localization of occult lesions in the pancreatic tail: a initial experience report. Abdom Radiol (NY) 2019; 44:559-567. [PMID: 30121778 DOI: 10.1007/s00261-018-1746-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
PURPOSE The aim of this study is to review our initial experience of Double contrast-enhanced ultrasonography (DCEUS) in the preoperative detection of pancreatic tail occult tumors. METHODS Thirty-five patients were recruited to undergo DCEUS of the pancreas suspected by occult lesions of pancreatic with MRI or clinical evidence. The radiologists assessed the images (conventional US, DCEUS, and MRI) for enhancement phases, tumor presence, location, enhancement characteristics, and tumor conspicuity. The differences in the onset times of the phases between DCEUS and MRI were noted. Tumor conspicuity was graded on a four-point scale for conspicuity comparison among three imaging modalities. RESULTS Pancreatic tail tumors were missed on conventional transabdominal US in 11 of 35 patients. DCEUS revealed 12 lesions of 35 patients. Pancreatic tail tumors were identified on MRI in 10 of 35 patients. The sensitivity and specificity of DCEUS for depicting occult lesions of ≤ 2.2 cm were 92% and 95%, respectively. In contrast, the sensitivity and specificity of conventional US were 67% and 66%, respectively. The sensitivity and specificity of MRI were 91% and 88%, respectively. The conspicuity ratings of the three phases did not significantly differ between the DCEUS and MRI groups (P > 0.05). The DCEUS phases started much earlier than the corresponding MRI phases. CONCLUSION DCEUS is a promising technique in the detection of occult pancreatic tail tumors and is possibly superior to dynamic enhanced MRI in the case of some peripheral lesions.
Collapse
Affiliation(s)
- Wei Zhu
- Echo Lab of Cardiology, Department/Department of Ultrasound, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Gang Mai
- Department of Hepatobiliopancreatic Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Xiang Zhou
- Department of Interventional Radiology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China.
| | - Bin Song
- Radiology Department, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| |
Collapse
|
15
|
Hoang UN, Mojdeh Mirmomen S, Meirelles O, Yao J, Merino M, Metwalli A, Marston Linehan W, Malayeri AA. Assessment of multiphasic contrast-enhanced MR textures in differentiating small renal mass subtypes. Abdom Radiol (NY) 2018; 43:3400-3409. [PMID: 29858935 DOI: 10.1007/s00261-018-1625-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
PURPOSE This study seeks to evaluate the use of quantitative texture parameters extracted from multiphasic contrast-enhanced magnetic resonance (MR) imaging in differentiating between benign and malignant masses (oncocytoma vs. clear cell and papillary RCC) and between common subtypes of renal cell carcinoma (clear cell vs. papillary RCC) in small renal masses (< 4 cm). METHOD One-hundred and forty-two renal lesions (90 clear cell and 22 papillary RCCs; 30 oncocytomas) were identified in a cohort of 41 patients (18 men, 23 women: mean age, 52.8 ± 14.4 years) who underwent preoperative multiphasic contrast-enhanced MR with four phases (unenhanced, arterial, venous, and delayed) between 2015 and 2016. In this study, texture features were extracted from entire cross-sectional tumoral region in three consecutive slices containing the largest cross-sectional area from each of the four phases. The change in imaging feature between precontrast imaging and each postcontrast phase was calculated. Data dimension reduction and feature selection were performed by conducting (1) pairwise Wilcoxon rank test followed by modified false discovery rate adjustment, and (2) Lasso regression. Multivariate modeling incorporating the selected features was performed using random forest classification method. RESULTS Histogram imaging features were informative variables in differentiating between benign and malignant masses, while textures imaging features were of added value in differentiating between subtypes of RCCs. Papillary RCCs were distinguished from clear cell RCCs (sensitivity 65.5%, specificity 88%, and accuracy 77.9%), oncocytomas from clear cell RCCs (sensitivity 67.3%, specificity 88.9%, and accuracy 79.3%), and oncocytomas from papillary and clear cell RCCs (sensitivity 64.7%, specificity 85.9%, and accuracy 77.9%). CONCLUSIONS A combination of histogram and texture imaging features on multiphasic MR can help differentiate histologic cell types in common small renal masses (< 4 cm).
Collapse
Affiliation(s)
- Uyen N Hoang
- Clinical Center, National Institutes of Health, Bethesda, MD, 20892, USA.
- Urologic Oncology Branch, National Cancer Institute, Bethesda, MD, 20892, USA.
- , 10 Center Dr, Bethesda, MD, 20814, USA.
| | - S Mojdeh Mirmomen
- Clinical Center, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Osorio Meirelles
- Neuroepidemiology Section, National Institute of Aging, Bethesda, MD, 20892, USA
| | - Jianhua Yao
- Clinical Center, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Maria Merino
- Urologic Oncology Branch, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Adam Metwalli
- Urologic Oncology Branch, National Cancer Institute, Bethesda, MD, 20892, USA
| | - W Marston Linehan
- Neuroepidemiology Section, National Institute of Aging, Bethesda, MD, 20892, USA
| | - Ashkan A Malayeri
- Clinical Center, National Institutes of Health, Bethesda, MD, 20892, USA
- Urologic Oncology Branch, National Cancer Institute, Bethesda, MD, 20892, USA
| |
Collapse
|
16
|
Withey SJ, Gariani J, Reddy K, Prezzi D, Kelly-Morland C, Ilyas S, Adam A, Goh V. Is there a role for perfusion imaging in assessing treatment response following ablative therapy of small renal masses-A systematic review. Eur J Radiol Open 2018; 5:102-107. [PMID: 30094296 PMCID: PMC6077124 DOI: 10.1016/j.ejro.2018.07.002] [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: 02/18/2018] [Accepted: 07/02/2018] [Indexed: 12/01/2022] Open
Abstract
Aims Ablation therapies are an innovative nephron-sparing alternative to radical nephrectomy for early stage renal cancers, although determination of treatment success is challenging. We aimed to undertake a systematic review of the literature to determine whether assessment of tumour perfusion may improve response assessment or alter clinical management when compared to standard imaging. Material and Methods Two radiologists performed independent primary literature searches for perfusion imaging in response assessment following ablative therapies (radiofrequency ablation and cryotherapy) focused on renal tumours. Results 5 of 795 articles were eligible, totaling 110 patients. The study designs were heterogeneous with different imaging techniques, perfusion calculations, reference standard and follow-up periods. All studies found lower perfusion following treatment, with a return of ‘high grade’ perfusion in the 7/110 patients with residual or recurrent tumour. One study found perfusion curves were different between successfully ablated regions and residual tumour. Conclusions Studies were limited by small sample size and heterogeneous methodology. No studies have investigated the impact of perfusion imaging on management. This review highlights the current lack of evidence for perfusion imaging in response assessment following renal ablation, however it suggests that there may be a future role. Further prospective research is required to address this.
Collapse
Affiliation(s)
- S J Withey
- Department of Radiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom.,Cancer Imaging, Division of Imaging Sciences and Biomedical Engineering, King's College London, United Kingdom
| | - J Gariani
- Cancer Imaging, Division of Imaging Sciences and Biomedical Engineering, King's College London, United Kingdom
| | - K Reddy
- Department of Radiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom
| | - D Prezzi
- Department of Radiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom.,Cancer Imaging, Division of Imaging Sciences and Biomedical Engineering, King's College London, United Kingdom
| | - C Kelly-Morland
- Department of Radiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom.,Cancer Imaging, Division of Imaging Sciences and Biomedical Engineering, King's College London, United Kingdom
| | - S Ilyas
- Department of Radiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom
| | - A Adam
- Department of Radiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom.,Cancer Imaging, Division of Imaging Sciences and Biomedical Engineering, King's College London, United Kingdom
| | - V Goh
- Department of Radiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom.,Cancer Imaging, Division of Imaging Sciences and Biomedical Engineering, King's College London, United Kingdom
| |
Collapse
|
17
|
Kang KM, Choi SH, Hwang M, Yoo RE, Yun TJ, Kim JH, Sohn CH. Application of Synthetic MRI for Direct Measurement of Magnetic Resonance Relaxation Time and Tumor Volume at Multiple Time Points after Contrast Administration: Preliminary Results in Patients with Brain Metastasis. Korean J Radiol 2018; 19:783-791. [PMID: 29962885 PMCID: PMC6005937 DOI: 10.3348/kjr.2018.19.4.783] [Citation(s) in RCA: 12] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 01/19/2018] [Indexed: 12/21/2022] Open
Abstract
Objective The purpose of this study was to investigate the time-dependent effects of contrast medium on multi-dynamic, multi-echo (MDME) sequence in patients with brain metastases. Materials and Methods This study included 7 patients with 15 brain metastases who underwent magnetic resonance (MR) examination which included MDME sequences at 1 minute, 10 minutes and 20 minutes after contrast injection. Two volumes of interests, covering an entire tumor (whole tumor) and the enhancing portion of the tumor, were derived from post-contrast synthetic T1-weighted images. Statistical comparisons were performed for three different time delays for histogram parameters of the longitudinal relaxation rate (R1) and the transverse relaxation rate (R2), and lesion volumes. Results The mean and the median of R1 and the mean of R2 in both the whole tumor and the inner enhancing portion were larger on the 10 minutes delayed images than on the 1 minute or 20 minutes delayed images (mean of R1 in the whole tumor on the 1 minute, 10 minutes, and 20 minutes delayed images: 1.26 ms, 1.39 ms, and 1.37 ms; mean of R1 in the inner enhancing portion: 1.43 ms, 1.53 ms and 1.44 ms; all p < 0.017). The volumes of the whole tumor and the inner enhancing portion were significantly larger in the 10 minutes and 20 minutes delayed images than on the 1 minute delayed images (all p < 0.017). Conclusion Magnetic resonance relaxation times and the volumes of the whole tumor and the inner enhancing portion were measured larger on the 10 minutes or 20 minutes delayed images than on the 1 minute delayed images. The MDME sequence immediately after contrast injection cannot fully reflect the effects of gadolinium-based contrast agent leakage in the tissue.
Collapse
Affiliation(s)
- Koung Mi Kang
- Department of Radiology, Seoul National University Hospital, Seoul 03080, Korea
| | - Seung Hong Choi
- Department of Radiology, Seoul National University Hospital, Seoul 03080, Korea.,Department of Radiology, Seoul National University College of Medicine, Seoul 03080, Korea.,Institute of Radiation Medicine, Seoul National University Medical Research Center, Seoul 03080, Korea.,Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, Korea
| | - Moonjung Hwang
- General Electronics (GE) Healthcare Korea, Seoul 06060, Korea
| | - Roh-Eul Yoo
- Department of Radiology, Seoul National University Hospital, Seoul 03080, Korea
| | - Tae Jin Yun
- Department of Radiology, Seoul National University Hospital, Seoul 03080, Korea
| | - Ji-Hoon Kim
- Department of Radiology, Seoul National University Hospital, Seoul 03080, Korea
| | - Chul-Ho Sohn
- Department of Radiology, Seoul National University Hospital, Seoul 03080, Korea.,Department of Radiology, Seoul National University College of Medicine, Seoul 03080, Korea
| |
Collapse
|
18
|
Budjan J, Attenberger UI, Schoenberg SO, Pietsch H, Jost G. The impact of injector-based contrast agent administration in time-resolved MRA. Eur Radiol 2018; 28:2246-53. [PMID: 29218620 DOI: 10.1007/s00330-017-5178-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Revised: 10/28/2017] [Accepted: 11/06/2017] [Indexed: 10/18/2022]
Abstract
OBJECTIVES Time-resolved contrast-enhanced MR angiography (4D-MRA), which allows the simultaneous visualization of the vasculature and blood-flow dynamics, is widely used in clinical routine. In this study, the impact of two different contrast agent injection methods on 4D-MRA was examined in a controlled, standardized setting in an animal model. METHODS Six anesthetized Goettingen minipigs underwent two identical 4D-MRA examinations at 1.5 T in a single session. The contrast agent (0.1 mmol/kg body weight gadobutrol, followed by 20 ml saline) was injected using either manual injection or an automated injection system. A quantitative comparison of vascular signal enhancement and quantitative renal perfusion analyses were performed. RESULTS Analysis of signal enhancement revealed higher peak enhancements and shorter time to peak intervals for the automated injection. Significantly different bolus shapes were found: automated injection resulted in a compact first-pass bolus shape clearly separated from the recirculation while manual injection resulted in a disrupted first-pass bolus with two peaks. In the quantitative perfusion analyses, statistically significant differences in plasma flow values were found between the injection methods. CONCLUSIONS The results of both qualitative and quantitative 4D-MRA depend on the contrast agent injection method, with automated injection providing more defined bolus shapes and more standardized examination protocols. KEY POINTS • Automated and manual contrast agent injection result in different bolus shapes in 4D-MRA. • Manual injection results in an undefined and interrupted bolus with two peaks. • Automated injection provides more defined bolus shapes. • Automated injection can lead to more standardized examination protocols.
Collapse
|
19
|
Ouchi K, Sakuma T, Fukuda K, Yoshitake M. Contrast-enhanced magnetic resonance imaging to detect chronic aortic dissection complicated by acute aortitis. Radiol Case Rep 2017; 12:443-448. [PMID: 28828099 PMCID: PMC5551913 DOI: 10.1016/j.radcr.2017.03.024] [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: 12/09/2016] [Revised: 03/16/2017] [Accepted: 03/25/2017] [Indexed: 11/28/2022] Open
Abstract
When chronic aortic dissection (CAD) is associated with aortic dilatation, the risk of aortic rupture increases. We report a case of CAD complicated by acute aortitis that was depicted in contrast-enhanced magnetic resonance imaging (MRI). Contrast-enhanced MRI allows early detection of subtle changes in the aortic wall as well as disease activity. Inflammation of aortic wall in the aortic dissection can be at higher risk of the dissected aortic expansion and rupture. When we recognize inflammation of unknown origin with CAD, contrast-enhanced MRI should be performed to rule out CAD complicated by acute aortitis may lead to catastrophic complications.
Collapse
Affiliation(s)
- Kotaro Ouchi
- Department of Radiology, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-Ku, Tokyo 105-8461, Japan
| | - Toru Sakuma
- Department of Radiology, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-Ku, Tokyo 105-8461, Japan
| | - Kunihiko Fukuda
- Department of Radiology, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-Ku, Tokyo 105-8461, Japan
| | - Michio Yoshitake
- Department of Cardiac Surgery, The Jikei University School of Medicine, Minato-Ku, Tokyo, Japan
| |
Collapse
|
20
|
Vreugdenburg TD, Ma N, Duncan JK, Riitano D, Cameron AL, Maddern GJ. Comparative diagnostic accuracy of hepatocyte-specific gadoxetic acid (Gd-EOB-DTPA) enhanced MR imaging and contrast enhanced CT for the detection of liver metastases: a systematic review and meta-analysis. Int J Colorectal Dis 2016; 31:1739-1749. [PMID: 27682648 DOI: 10.1007/s00384-016-2664-9] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [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] [Accepted: 09/19/2016] [Indexed: 02/04/2023]
Abstract
PURPOSE This systematic review evaluated the diagnostic accuracy and impact on patient management of hepatocyte-specific gadoxetic acid enhanced magnetic resonance imaging (GA-MRI) compared to contrast enhanced computed tomography (CE-CT) in patients with liver metastases. METHOD Four biomedical databases (PubMed, EMBASE, Cochrane Library, York CRD) were searched from January 1991 to February 2016. Studies investigating the accuracy or management impact of GA-MRI compared to CE-CT in patients with known or suspected liver metastases were included. Bias was evaluated using QUADAS-II. Univariate meta-analysis of sensitivity ratios (RR) were conducted in the absence of heterogeneity, calculated using I 2 , Tau values (τ) and prediction intervals. RESULTS Nine diagnostic accuracy studies (537 patients with 1216 lesions) and four change in management studies (488 patients with 281 lesions) were included. Per-lesion sensitivity and specificity estimates for GA-MRI ranged from 86.9-100.0 % and 80.2-98.0 %, respectively, compared to 51.8-84.6 % and 77.2-98.0 % for CE-CT. Meta-analysis found GA-MRI to be significantly more sensitive than CE-CT (RR = 1.29, 95 % CI = 1.18-1.40, P < 0.001), with equivalent specificity (RR = 0.97, 95 % CI 0.910-1.042, P = 0.44). The largest difference was observed for lesions smaller than 10 mm for which GA-MRI was significantly more sensitive (RR = 2.21, 95 % CI = 1.47-3.32, P < 0.001) but less specific (RR = 0.92, 95 % CI 0.87-0.98, P = 0.008). GA-MRI affected clinical management in 26 of 155 patients (16.8 %) who had a prior CE-CT; however, no studies investigated the consequences of using GA-MRI instead of CE-CT. CONCLUSION GA-MRI is significantly more sensitive than CE-CT for detecting liver metastases, which leads to a modest impact on patient management in the context of an equivocal CE-CT result.
Collapse
Affiliation(s)
- Thomas D Vreugdenburg
- Australian Safety and Efficacy Register of New Interventional Procedures-Surgical (ASERNIP-S), The Royal Australasian College of Surgeons, 199 Ward Street, North Adelaide, South Australia, 5006, Australia.
| | - Ning Ma
- Australian Safety and Efficacy Register of New Interventional Procedures-Surgical (ASERNIP-S), The Royal Australasian College of Surgeons, 199 Ward Street, North Adelaide, South Australia, 5006, Australia
| | - Joanna K Duncan
- Australian Safety and Efficacy Register of New Interventional Procedures-Surgical (ASERNIP-S), The Royal Australasian College of Surgeons, 199 Ward Street, North Adelaide, South Australia, 5006, Australia
| | - Dagmara Riitano
- Australian Safety and Efficacy Register of New Interventional Procedures-Surgical (ASERNIP-S), The Royal Australasian College of Surgeons, 199 Ward Street, North Adelaide, South Australia, 5006, Australia
| | - Alun L Cameron
- Australian Safety and Efficacy Register of New Interventional Procedures-Surgical (ASERNIP-S), The Royal Australasian College of Surgeons, 199 Ward Street, North Adelaide, South Australia, 5006, Australia
| | - Guy J Maddern
- Australian Safety and Efficacy Register of New Interventional Procedures-Surgical (ASERNIP-S), The Royal Australasian College of Surgeons, 199 Ward Street, North Adelaide, South Australia, 5006, Australia
- Discipline of Surgery, University of Adelaide and The Queen Elizabeth Hospital, Adelaide, South Australia, Australia
| |
Collapse
|
21
|
Ahn KS, Kang CH, Kim Y, Jeong WK. Diagnosis of adhesive capsulitis: comparison of contrast-enhanced MRI with noncontrast-enhanced MRI. Clin Imaging 2015; 39:1061-7. [PMID: 26362354 DOI: 10.1016/j.clinimag.2015.08.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [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: 03/30/2015] [Revised: 07/31/2015] [Accepted: 08/12/2015] [Indexed: 11/18/2022]
Abstract
OBJECTIVE To compare the diagnostic performance of contrast-enhanced (CE) magnetic resonance imaging (MRI) and non-CE MRI for adhesive capsulitis (AC). METHODS CE MRI of 50 AC and 53 non-AC patients were reviewed by two radiologists independently. RESULTS Axillary capsular thickening and T2 hyperintensity (sensitivity=92-94%; specificity=53-64%) and enhancement of the axillary capsule and rotator interval (sensitivity=92-98%; specificity=38-64%) were helpful in diagnosing AC. Interobserver reliability was highest with axillary joint capsule enhancement (κ=0.92). CONCLUSION Non-CE and CE MRI are helpful in confirming the clinical diagnosis of AC. CE-MRI may improve assessment of the rotator interval and diagnostic confidence in patients with AC.
Collapse
Affiliation(s)
- Kyung-Sik Ahn
- Department of Radiology, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea
| | - Chang Ho Kang
- Department of Radiology, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea.
| | - Yura Kim
- Department of Radiology, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea
| | - Woong-Kyo Jeong
- Department of Orthopaedic Surgery, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea
| |
Collapse
|
22
|
Corona-Villalobos CP, Zhang Y, Zhang WD, Kamel IR. Magnetic resonance imaging of the liver after loco-regional and systemic therapy. Magn Reson Imaging Clin N Am 2015; 22:353-72. [PMID: 25086934 DOI: 10.1016/j.mric.2014.04.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [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: 12/19/2022]
Abstract
Assessment of tumor response is crucial in determining the effectiveness of loco-regional and systemic therapy, and for determining the need for subsequent treatment. The ultimate goal is to improve patient's survival. Changes in tumor size and enhancement after therapy may not be detected early by the traditional response criteria. Tumor response is better assessed in the entire tumor volume rather than in a single axial plane. The purpose of this article is to familiarize the reader with early treatment response assessed by anatomic and volumetric functional magnetic resonance imaging metrics of the liver after loco-regional and systemic therapy.
Collapse
Affiliation(s)
- Celia Pamela Corona-Villalobos
- The Russell H. Morgan Department of Radiology and Radiological Sciences, Johns Hopkins School of Medicine, 600 North Wolfe Street, MRI 110B, Baltimore, MD 21287, USA
| | - Yan Zhang
- The Russell H. Morgan Department of Radiology and Radiological Sciences, Johns Hopkins School of Medicine, 601 North Caroline Street, Room 4240, Baltimore, MD 21287, USA; Department of Radiology, Shandong Medical Imaging Research Institute, 324 Jingwu Road, MRI, Jinan 250021, Republic of China
| | - Wei-Dong Zhang
- The Russell H. Morgan Department of Radiology and Radiological Sciences, Johns Hopkins School of Medicine, 601 North Caroline Street, Room 4240, Baltimore, MD 21287, USA
| | - Ihab R Kamel
- The Russell H. Morgan Department of Radiology and Radiological Sciences, Johns Hopkins School of Medicine, 600 North Wolfe Street, MRI 143, Baltimore, MD 21287, USA.
| |
Collapse
|