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Yao F, Li J, Huang M, Gao X, Zhang Y. Comparison of computed versus acquired readout-segmented diffusion-weighted imaging in visualizing scrotal or testicular lesions. Clin Radiol 2024; 79:818-825. [PMID: 39122632 DOI: 10.1016/j.crad.2024.07.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 06/26/2024] [Accepted: 07/15/2024] [Indexed: 08/12/2024]
Abstract
PURPOSE Combining computed diffusion-weighted imaging (DWI) with readout-segmented echo-planar-imaging may shorten acquisition time and improve imaging quality. This study aimed to compare computed vs. acquired DWI qualitatively and quantitatively in visualizing scrotal or testicular lesions. MATERIALS AND METHODS We retrospectively enrolled 57 consecutive men who underwent scrotal MRI. Four computed DWI sets (cDWI800, cDWI1000, cDWI1200, and cDWI1400) were generated from acquired DWI with two lower b-values (150 and 600 s/mm2). Acquired DWI (DWI800 and DWI1000) and computed DWI were compared through qualitative (susceptibility artifact, signal loss artifact, anatomic clarity, and lesion conspicuity) and quantitative assessment (signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), and lesion-to-testicular parenchyma contrast ratio (CR)). RESULTS Computed DWI was prone to signal loss artifact and slightly lower assessment scores in terms of anatomic clarity and lesion conspicuity, comparing with acquired DWI. The SNR of computed and acquired DWI decreased with increasing b value. Under the same b-values (800 and 1,000 s/mm2), there was no difference in the median SNR and CR between computed and acquired DWI. The median CR of cDWI1400 was significantly higher than that of the other DWI sets excepting cDWI1200 (P=1.000). The median CNR tended to be lower for computed vs. acquired DWI, while no significant difference (P=0.233). CONCLUSIONS Computed and acquired DWI were nearly equivalent in both qualitative and quantitative evaluations at the b values of 800 and 1,000 s/mm2. Computed DWI could enhance the contrast of scrotal or testicular lesions.
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Affiliation(s)
- F Yao
- Department of MRI, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province 450052, China.
| | - J Li
- Department of MRI, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province 450052, China
| | - M Huang
- Department of MRI, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province 450052, China
| | - X Gao
- Department of MRI, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province 450052, China
| | - Y Zhang
- Department of MRI, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province 450052, China
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Diagnostic Benefit of High b-Value Computed Diffusion-Weighted Imaging in Patients with Hepatic Metastasis. J Clin Med 2021; 10:jcm10225289. [PMID: 34830572 PMCID: PMC8622173 DOI: 10.3390/jcm10225289] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 11/10/2021] [Accepted: 11/12/2021] [Indexed: 11/17/2022] Open
Abstract
Diffusion-weighted imaging (DWI) has rapidly become an essential tool for the detection of malignant liver lesions. The aim of this study was to investigate the usefulness of high b-value computed DWI (c-DWI) in comparison to standard DWI in patients with hepatic metastases. In total, 92 patients with histopathologic confirmed primary tumors with hepatic metastasis were retrospectively analyzed by two readers. DWI was obtained with b-values of 50, 400 and 800 or 1000 s/mm2 on a 1.5 T magnetic resonance imaging (MRI) scanner. C-DWI was calculated with a monoexponential model with high b-values of 1000, 2000, 3000, 4000 and 5000 s/mm2. All c-DWI images with high b-values were compared to the acquired DWI sequence at a b-value of 800 or 1000 s/mm2 in terms of volume, lesion detectability and image quality. In the group of a b-value of 800 from a b-value of 2000 s/mm2, hepatic lesion sizes were significantly smaller than on acquired DWI (metastases lesion sizes b = 800 vs. b 2000 s/mm2: mean 25 cm3 (range 10-60 cm3) vs. mean 17.5 cm3 (range 5-35 cm3), p < 0.01). In the second group at a high b-value of 1500 s/mm2, liver metastases were larger than on c-DWI at higher b-values (b = 1500 vs. b 2000 s/mm2, mean 10 cm3 (range 4-24 cm3) vs. mean 9 cm3 (range 5-19 cm3), p < 0.01). In both groups, there was a clear reduction in lesion detectability at b = 2000 s/mm2, with hepatic metastases being less visible compared to c-DWI images at b = 1500 s/mm2 in at least 80% of all patients. Image quality dropped significantly starting from c-DWI at b = 3000 s/mm2. In both groups, almost all high b-values images at b = 4000 s/mm2 and 5000 s/mm2 were not diagnostic due to poor image quality. High c-DWI b-values up to b = 1500 s/mm2 offer comparable detectability for hepatic metastases compared to standard DWI. Higher b-value images over 2000 s/mm2 lead to a noticeable reduction in imaging quality, which could hamper diagnosis.
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3
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Sartoretti T, Sartoretti E, Wyss M, Mannil M, van Smoorenburg L, Eichenberger B, Reischauer C, Alfieri A, Binkert C, Sartoretti-Schefer S. Diffusion-weighted MRI of ischemic stroke at 3T: Value of synthetic b-values. Br J Radiol 2021; 94:20200869. [PMID: 33596102 DOI: 10.1259/bjr.20200869] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES Diffusion-weighted imaging (DWI) plays a crucial role in the diagnosis of ischemic stroke. We assessed the value of computed and acquired high b-value DWI in comparison with conventional b = 1000 s mm-2 DWI for ischemic stroke at 3T. METHODS We included 36 patients with acute ischemic stroke who presented with diffusion abnormalities on DWI performed within 24 h of symptom onset. B-values of 0, 500, 1000 and 2000 s mm-2 were acquired. Synthetic images with b-values of 1000, 1500, 2000 and 2500 s mm-2 were computed. Two readers compared synthetic (syn) and acquired (acq) b = 2000 s mm-2 images with acquired b = 1000 s mm-2 images in terms of lesion detection rate, image quality, presence of uncertain hyperintensities and lesion conspicuity. Readers also selected their preferred b-value. Contrast ratio (CR) measurements were performed. Non-parametrical statistical tests and weighted Cohens' κ tests were computed. RESULTS Syn1000 and syn1500 matched acq1000 images in terms of lesion detection rate, image quality and presence of uncertain hyperintensities but presented with significantly improved lesion conspicuity (p < 0.01) and were frequently selected as preferred b-values. Acq2000 images exhibited a similar lesion detection rate and improved lesion conspicuity (p < 0.01) but worse image quality (p < 0.01) than acq1000 images. Syn2000 and syn2500 images performed significantly worse (p < 0.01) than acq1000 images in most or all categories. CR significantly increased with increasing b-values. CONCLUSION Synthetic images at b = 1000 and 1500 s mm-2 and acquired DWI images at b = 2000 s mm-2 may be of clinical value due to improved lesion conspicuity. ADVANCES IN KNOWLEDGE Synthetic b-values enable improved lesion conspicuity for DWI of ischemic stroke.
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Affiliation(s)
- Thomas Sartoretti
- Institute of Radiology, Kantonsspital Winterthur, Winterthur, Switzerland.,Faculty of Medicine, University of Zürich, Zürich, Switzerland.,Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, the Netherlands
| | - Elisabeth Sartoretti
- Institute of Radiology, Kantonsspital Winterthur, Winterthur, Switzerland.,Faculty of Medicine, University of Zürich, Zürich, Switzerland
| | - Michael Wyss
- Institute of Radiology, Kantonsspital Winterthur, Winterthur, Switzerland.,Philips Healthsystems, Zürich, Switzerland
| | - Manoj Mannil
- Institute of Neuroradiology, Kantonsspital Aarau, Aarau, Switzerland
| | | | | | - Carolin Reischauer
- Department of Medicine, University of Fribourg, Fribourg, Switzerland.,Department of Radiology, HFR Fribourg-Hôpital Cantonal, Fribourg, Switzerland
| | - Alex Alfieri
- Department of Neurosurgery, Kantonsspital Winterthur, Winterthur, Switzerland
| | - Christoph Binkert
- Institute of Radiology, Kantonsspital Winterthur, Winterthur, Switzerland
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Choi BH, Baek HJ, Ha JY, Ryu KH, Moon JI, Park SE, Bae K, Jeon KN, Jung EJ. Feasibility Study of Synthetic Diffusion-Weighted MRI in Patients with Breast Cancer in Comparison with Conventional Diffusion-Weighted MRI. Korean J Radiol 2020; 21:1036-1044. [PMID: 32691539 PMCID: PMC7371621 DOI: 10.3348/kjr.2019.0568] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 02/20/2020] [Accepted: 03/17/2020] [Indexed: 01/06/2023] Open
Abstract
OBJECTIVE To investigate the clinical feasibility of synthetic diffusion-weighted imaging (sDWI) at different b-values in patients with breast cancer by assessing the diagnostic image quality and the quantitative measurements compared with conventional diffusion-weighted imaging (cDWI). MATERIALS AND METHODS Fifty patients with breast cancer were assessed using cDWI at b-values of 800 and 1500 s/mm² (cDWI800 and cDWI1500) and sDWI at b-values of 1000 and 1500 s/mm² (sDWI1000 and sDWI1500). Qualitative analysis (normal glandular tissue suppression, overall image quality, and lesion conspicuity) was performed using a 4-point Likert-scale for all DWI sets and the cancer detection rate (CDR) was calculated. We also evaluated cancer-to-parenchyma contrast ratios for each DWI set in 45 patients with the lesion identified on any of the DWI sets. Statistical comparisons were performed using Friedman test, one-way analysis of variance, and Cochran's Q test. RESULTS All parameters of qualitative analysis, cancer-to-parenchyma contrast ratios, and CDR increased with increasing b-values, regardless of the type of imaging (synthetic or conventional) (p < 0.001). Additionally, sDWI1500 provided better lesion conspicuity than cDWI1500 (3.52 ± 0.92 vs. 3.39 ± 0.90, p < 0.05). Although cDWI1500 showed better normal glandular tissue suppression and overall image quality than sDWI1500 (3.66 ± 0.78 and 3.73 ± 0.62 vs. 3.32 ± 0.90 and 3.35 ± 0.81, respectively; p < 0.05), there was no significant difference in their CDR (90.0%). Cancer-to-parenchyma contrast ratios were greater in sDWI1500 than in cDWI1500 (0.63 ± 0.17 vs. 0.55 ± 0.18, p < 0.001). CONCLUSION sDWI1500 can be feasible for evaluating breast cancers in clinical practice. It provides higher tumor conspicuity, better cancer-to-parenchyma contrast ratio, and comparable CDR when compared with cDWI1500.
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Affiliation(s)
- Bo Hwa Choi
- Department of Radiology Gyeongsang National University School of Medicine, Gyeongsang National University Changwon Hospital, Changwon, Korea.,Department of Radiology, National Cancer Center, Goyang, Korea
| | - Hye Jin Baek
- Department of Radiology Gyeongsang National University School of Medicine, Gyeongsang National University Changwon Hospital, Changwon, Korea.
| | - Ji Young Ha
- Department of Radiology Gyeongsang National University School of Medicine, Gyeongsang National University Changwon Hospital, Changwon, Korea
| | - Kyeong Hwa Ryu
- Department of Radiology Gyeongsang National University School of Medicine, Gyeongsang National University Changwon Hospital, Changwon, Korea
| | - Jin Il Moon
- Department of Radiology Gyeongsang National University School of Medicine, Gyeongsang National University Changwon Hospital, Changwon, Korea
| | - Sung Eun Park
- Department of Radiology Gyeongsang National University School of Medicine, Gyeongsang National University Changwon Hospital, Changwon, Korea
| | - Kyungsoo Bae
- Department of Radiology Gyeongsang National University School of Medicine, Gyeongsang National University Changwon Hospital, Changwon, Korea
| | - Kyung Nyeo Jeon
- Department of Radiology Gyeongsang National University School of Medicine, Gyeongsang National University Changwon Hospital, Changwon, Korea
| | - Eun Jung Jung
- Department of Surgery, Gyeongsang National University School of Medicine, Gyeongsang National University Changwon Hospital, Changwon, Korea
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5
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Tokunaga K, Arizono S, Shimizu H, Fujimoto K, Kurata M, Minamiguchi S, Isoda H, Togashi K. Optimizing b-values for accurate depiction of pancreatic cancer with tumor-associated pancreatitis on computed diffusion-weighted imaging. Clin Imaging 2020; 61:20-26. [PMID: 31954347 DOI: 10.1016/j.clinimag.2020.01.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 12/05/2019] [Accepted: 01/07/2020] [Indexed: 12/19/2022]
Abstract
PURPOSE To determine the optimal b-value for accurate depiction of pancreatic cancer (PC) in patients with active tumor-associated pancreatitis (TAP), using computed diffusion-weighted imaging (cDWI) with a range of b-values up to 3000 s/mm2. METHODS The study protocol was approved by the institutional review board. We retrospectively analyzed 34 consecutive PC cases with active TAP who underwent pancreatectomy without preoperative therapy. Four cDWI datasets with b-values of 1500-3000 s/mm2 (cDWI1500-cDWI3000) were generated from the original DWI datasets with b-values of 0 and 1000 s/mm2 obtained using a 3-T scanner. Two board-certified radiologists evaluated images qualitatively (tumor conspicuity and total image quality), and another two board-certified radiologists placed regions of interest for quantitative evaluations (apparent diffusion coefficient [ADC] values of both lesions, contrast ratio [CR] of PC to active TAP, and volume ratio [VR] of PC to surgical specimen). RESULTS As the b-value increased, tumor conspicuity improved significantly in cDWI2000 and cDWI2500 (P = 0.0121 and 0.0015, respectively), although total image quality decreased in all cDWIs compared with DWI1000 (P < 0.0001). Significantly lower ADC values were seen in PC (P < 0.0001). All cDWI groups showed positive correlation between the tumor conspicuity and ADC difference between PC and TAP. CR increased with the b-value, while VR decreased. Significant equivalence of VR to the surgical specimen was seen on cDWI2000 (P = 0.0031). CONCLUSION Accurate depiction of PC was optimal with cDWI2000 in the presence of active TAP.
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Affiliation(s)
- Koji Tokunaga
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Kawaharacho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
| | - Shigeki Arizono
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Kawaharacho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
| | - Hironori Shimizu
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Kawaharacho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
| | - Koji Fujimoto
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Kawaharacho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
| | - Mariyo Kurata
- Department of Diagnostic Pathology, Kyoto University Graduate School of Medicine, 54 Kawaharacho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
| | - Sachiko Minamiguchi
- Department of Diagnostic Pathology, Kyoto University Graduate School of Medicine, 54 Kawaharacho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
| | - Hiroyoshi Isoda
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Kawaharacho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
| | - Kaori Togashi
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Kawaharacho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
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6
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Kamata Y, Shinohara Y, Kuya K, Tsubouchi Y, Saito Y, Maegaki Y, Fujii S, Ogawa T. Computed diffusion-weighted imaging for acute pediatric encephalitis/encephalopathy. Acta Radiol 2019; 60:1341-1347. [PMID: 30674215 DOI: 10.1177/0284185118823335] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Yuji Kamata
- Division of Radiology, Department of Pathophysiological and Therapeutic Science, Faculty of Medicine, Tottori University, Yonago, Japan
| | - Yuki Shinohara
- Division of Radiology, Department of Pathophysiological and Therapeutic Science, Faculty of Medicine, Tottori University, Yonago, Japan
| | - Keita Kuya
- Division of Radiology, Department of Pathophysiological and Therapeutic Science, Faculty of Medicine, Tottori University, Yonago, Japan
| | - Yoshiko Tsubouchi
- Division of Child Neurology, Department of Brain and Neurosciences, Faculty of Medicine, Tottori University, Yonago, Japan
| | - Yoshiaki Saito
- Division of Child Neurology, Department of Brain and Neurosciences, Faculty of Medicine, Tottori University, Yonago, Japan
| | - Yoshihiro Maegaki
- Division of Child Neurology, Department of Brain and Neurosciences, Faculty of Medicine, Tottori University, Yonago, Japan
| | - Shinya Fujii
- Division of Radiology, Department of Pathophysiological and Therapeutic Science, Faculty of Medicine, Tottori University, Yonago, Japan
| | - Toshihide Ogawa
- Division of Radiology, Department of Pathophysiological and Therapeutic Science, Faculty of Medicine, Tottori University, Yonago, Japan
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7
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Computed diffusion-weighted imaging for differentiating synovial proliferation from joint effusion in hand arthritis. Rheumatol Int 2019; 39:2111-2118. [DOI: 10.1007/s00296-019-04425-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Accepted: 08/10/2019] [Indexed: 12/21/2022]
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8
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Yamashita K, Hiwatashi A, Togao O, Kikuchi K, Shimomiya Y, Kamei R, Momosaka D, Matsumoto N, Kobayashi K, Takemura A, Kwee TC, Takahara T, Honda H. Improved Visualization of Middle Ear Cholesteatoma with Computed Diffusion-weighted Imaging. Magn Reson Med Sci 2019; 18:233-237. [PMID: 30518733 PMCID: PMC6630047 DOI: 10.2463/mrms.tn.2018-0068] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Computed DWI (cDWI) is a mathematical technique that calculates arbitrary higher b value images from at least two different lower b values. In addition, the removal of high intensity noise with image processing on cDWI could improve cholesteatoma-background contrast-to-noise ratio (CNR). In the present study, noise reduction was performed by the cut-off values of apparent diffusion coefficient (ADC) less than 0 and 0.4 × 10−3 s/mm2. The cholesteatoma to non-cholesteatoma CNR was increased using a noise reduction algorithm for clinical setting.
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Affiliation(s)
- Koji Yamashita
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University
| | - Akio Hiwatashi
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University
| | - Osamu Togao
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University
| | - Kazufumi Kikuchi
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University
| | - Yamato Shimomiya
- Division of Marketing, Department of Clinical Application Development, Ziosoft, Inc
| | - Ryotaro Kamei
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University
| | - Daichi Momosaka
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University
| | - Nozomu Matsumoto
- Department of Otorhinolaryngology, Graduate School of Medical Sciences, Kyushu University
| | - Kouji Kobayashi
- Department of Medical Technology, Kyushu University Hospital
| | | | - Thomas Christian Kwee
- Department of Radiology, Nuclear Medicine and Molecular Imaging, University Medical Center Groningen
| | - Taro Takahara
- Department of Biomedical Engineering, Tokai University, School of Engineering
| | - Hiroshi Honda
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University
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9
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Computed Diffusion Weighted Imaging of the Liver Using Extrapolation Technique in Patients Who Underwent Liver Transplantation With Hepatocellular Carcinomas: Initial Experience and Feasibility Study. J Comput Assist Tomogr 2018; 42:632-636. [PMID: 29787493 DOI: 10.1097/rct.0000000000000720] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE This study aimed to evaluate the feasibility and image quality of computed diffusion weighted imaging (DWI) of the liver in patients with hepatocellular carcinoma (HCC). METHODS Twenty-four patients who underwent liver transplantation with HCC were enrolled. Computed DWI was synthesized for b-values of 800 (cDWI800) and 1200 s/mm (cDWI1200) using directly acquired DWI with b-values of 0, 50, and 500 s/mm. Signal intensity of HCC, background liver, and contrast-to-noise ratio were evaluated for directly acquired DWI of 800 s/mm (dDWI800), cDWI800, and cDWI1200. Two radiologists evaluated the image quality for contrast between HCC and liver, suppression of background signal and T2 shine-through, and overall image quality. RESULTS cDWI1200 showed the lowest contrast-to-noise ratio. Qualitative scores for background suppression and decreased T2 shine-through were highest for cDWI1200. However, contrast between HCC and background liver was worst in cDWI1200. CONCLUSIONS In computed DWI of high b-values, contrast between HCC and background liver was very low.
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10
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Fukukura Y, Kumagae Y, Hakamada H, Shindo T, Takumi K, Kamimura K, Nakajo M, Umanodan A, Yoshiura T. Computed diffusion-weighted MR imaging for visualization of pancreatic adenocarcinoma: Comparison with acquired diffusion-weighted imaging. Eur J Radiol 2017; 95:39-45. [DOI: 10.1016/j.ejrad.2017.07.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 06/28/2017] [Accepted: 07/25/2017] [Indexed: 02/06/2023]
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11
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Kawahara S, Isoda H, Fujimoto K, Shimizu H, Furuta A, Arizono S, Ohno T, Yamashita R, Ono A, Togashi K. Additional benefit of computed diffusion-weighted imaging for detection of hepatic metastases at 1.5T. Clin Imaging 2016; 40:481-5. [DOI: 10.1016/j.clinimag.2015.12.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Revised: 12/16/2015] [Accepted: 12/18/2015] [Indexed: 12/27/2022]
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12
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Scan time minimization in hepatic diffusion-weighted imaging: evaluation of the simultaneous multislice acceleration technique with different acceleration factors and gradient preparation schemes. MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE 2016; 29:739-49. [DOI: 10.1007/s10334-016-0553-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 03/15/2016] [Accepted: 03/16/2016] [Indexed: 01/21/2023]
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13
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14
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Vilgrain V, Esvan M, Ronot M, Caumont-Prim A, Aubé C, Chatellier G. A meta-analysis of diffusion-weighted and gadoxetic acid-enhanced MR imaging for the detection of liver metastases. Eur Radiol 2016; 26:4595-4615. [PMID: 26883327 DOI: 10.1007/s00330-016-4250-5] [Citation(s) in RCA: 95] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Revised: 01/22/2016] [Accepted: 01/25/2016] [Indexed: 12/11/2022]
Abstract
OBJECTIVES To obtain the diagnostic performance of diffusion-weighted (DW) and gadoxetic-enhanced magnetic resonance (MR) imaging in the detection of liver metastases. METHODS A comprehensive search (EMBASE, PubMed, Cochrane) was performed to identify relevant articles up to June 2015. Inclusion criteria were: liver metastases, DW-MR imaging and/or gadoxetic acid-enhanced MR imaging, and per-lesion statistics. The reference standard was histopathology, intraoperative observation and/or follow-up. Sources of bias were assessed using the QUADAS-2 tool. A linear mixed-effect regression model was used to obtain sensitivity estimates. RESULTS Thirty-nine articles were included (1,989 patients, 3,854 metastases). Sensitivity estimates for DW-MR imaging, gadoxetic acid-enhanced MR imaging and the combined sequence for detecting liver metastases on a per-lesion basis was 87.1 %, 90.6 % and 95.5 %, respectively. Sensitivity estimates by gadoxetic acid-enhanced MR imaging and the combined sequence were significantly better than DW-MR imaging (p = 0.0001 and p < 0.0001, respectively), and the combined MR sequence was significantly more sensitive than gadoxetic acid-enhanced MR imaging (p < 0.0001). Similar results were observed in articles that compared the three techniques simultaneously, with only colorectal liver metastases and in liver metastases smaller than 1 cm. CONCLUSIONS In patients with liver metastases, combined DW-MR and gadoxetic acid-enhanced MR imaging has the highest sensitivity for detecting liver metastases on a per-lesion basis. KEY POINTS • DW-MRI is less sensitive than gadoxetic acid-enhanced MRI for detecting liver metastases • DW-MRI and gadoxetic acid-enhanced MRI is the best combination • Same results are observed in colorectal liver metastases • Same results are observed in liver metastases smaller than 1 cm • Same results are observed when histopathology alone is the reference standard.
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Affiliation(s)
- Valérie Vilgrain
- Department of Radiology, Assistance Publique-Hôpitaux de Paris, University Hospitals Paris Nord Val de Seine, Beaujon, Clichy, Hauts-de-Seine, France. .,University Paris Diderot, Sorbonne Paris Cité, Paris, France. .,INSERM U1149, Centre de Recherche Biomédicale Bichat-Beaujon, CRB3, Paris, France.
| | - Maxime Esvan
- Hôpital européen Georges-Pompidou, Unité d'Épidémiologie et de Recherche Clinique, 75015, Paris, France.,INSERM, Centre d'Investigation Clinique 1418, module Épidémiologie Clinique, 75015, Paris, France
| | - Maxime Ronot
- Department of Radiology, Assistance Publique-Hôpitaux de Paris, University Hospitals Paris Nord Val de Seine, Beaujon, Clichy, Hauts-de-Seine, France.,University Paris Diderot, Sorbonne Paris Cité, Paris, France.,INSERM U1149, Centre de Recherche Biomédicale Bichat-Beaujon, CRB3, Paris, France
| | - Aurore Caumont-Prim
- Hôpital européen Georges-Pompidou, Unité d'Épidémiologie et de Recherche Clinique, 75015, Paris, France.,INSERM, Centre d'Investigation Clinique 1418, module Épidémiologie Clinique, 75015, Paris, France
| | - Christophe Aubé
- Department of Radiology, CHU d'Angers, Angers, France.,Laboratoire HIFIH, LUNAM, Université d'Angers, Angers, France
| | - Gilles Chatellier
- Hôpital européen Georges-Pompidou, Unité d'Épidémiologie et de Recherche Clinique, 75015, Paris, France.,INSERM, Centre d'Investigation Clinique 1418, module Épidémiologie Clinique, 75015, Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, Faculté de Médecine, 75006, Paris, France
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Ohno Y, Koyama H, Yoshikawa T, Takenaka D, Kassai Y, Yui M, Matsumoto S, Sugimura K. Diffusion-weighted MR imaging using FASE sequence for 3T MR system: Preliminary comparison of capability for N-stage assessment by means of diffusion-weighted MR imaging using EPI sequence, STIR FASE imaging and FDG PET/CT for non-small cell lung cancer patients. Eur J Radiol 2015; 84:2321-31. [PMID: 26231045 DOI: 10.1016/j.ejrad.2015.07.019] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Revised: 07/08/2015] [Accepted: 07/09/2015] [Indexed: 12/16/2022]
Abstract
PURPOSE To prospectively compare the diagnostic capability of diffusion-weighted MR imaging obtained with fast advantage spin-echo sequence (FASE-DWI) and echo planar imaging sequence (EPI-DWI), short inversion time inversion recovery fast advanced spin-echo (STIR FASE) imaging and FDG PET/CT for N-stage assessment of non-small cell carcinoma (NSCLC) patients. MATERIALS AND METHODS 95 consecutive operable NSCLC patients underwent STIR FASE imaging, FASE-DWI and EPI-DWI with a 3T system, integrated PET/CT, surgical treatment and pathological and follow-up examinations. Probability of lymph node metastasis was visually assessed using a 5-point visual scoring system. ROC analyses were used to compare diagnostic capability of all methods, while their diagnostic performance was also compared by means of McNemar's test on a per node basis. Finally, McNemar's test was also used for statistical comparison of accuracy of N-stage assessment. RESULTS Areas under the curve (Azs) for STIR FASE imaging (Az=0.95) and FASE-DWI (Az=0.92) were significantly larger than those for EPI-DWI (Az=0.78; p<0.0001 for STIR FSE imaging and FASE-DWI) and PET/CT (Az=0.85; p=0.0001 for STIR FSE imaging, p=0.03 for FASE-DWI) on a per node basis analysis. Accuracy of N-stage assessment using STIR FASE imaging (84.2% [80/95]) and FASE-DWI (83.2% [79/95]) was significantly higher than that using EPI-DWI (76.8% [73/95]; p=0.02 for STIR FASE imaging, p=0.03 for FASE-DWI) and PET/CT (73.7% [70/95]; p=0.002 for STIR FSE imaging, p=0.004 for FASE-DWI). CONCLUSION Qualitative N-stage assessments of NSCLC patients obtained with FASE-DWI as well as STIR FASE imaging are more sensitive and/or accurate than those obtained with EPI-DWI and FDG PET/CT.
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Affiliation(s)
- Yoshiharu Ohno
- Advanced Biomedical Imaging Research Center, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan; Division of Functional and Diagnostic Imaging Research, Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan.
| | - Hisanobu Koyama
- Division of Radiology, Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan
| | - Takeshi Yoshikawa
- Advanced Biomedical Imaging Research Center, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan; Division of Functional and Diagnostic Imaging Research, Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan
| | - Daisuke Takenaka
- Department of Radiology, Hyogo Cancer Center, Akashi, Hyogo, Japan
| | | | - Masao Yui
- Toshiba Medical Systems Corporation, Otawara, Tochigi, Japan
| | - Sumiaki Matsumoto
- Advanced Biomedical Imaging Research Center, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan; Division of Functional and Diagnostic Imaging Research, Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan
| | - Kazuro Sugimura
- Division of Radiology, Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan
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Donati OF, Hunziker R, Fischer MA, Raptis DA, Breitenstein S, Patak MA. MRI for characterization of primary tumors in the non-cirrhotic liver: Added value of Gd-EOB-DTPA enhanced hepatospecific phase. Eur J Radiol 2014; 83:1074-1079. [DOI: 10.1016/j.ejrad.2014.03.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Revised: 03/12/2014] [Accepted: 03/18/2014] [Indexed: 12/23/2022]
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