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Zou X, Liu L, Tan F, Tang H, Hu D, Li Z, Wang Q, Shen Y. Non-contrast-enhanced MR angiography of left gastric vein in patients with gastroesophageal varices: morphology and blood supply analysis. Eur Radiol 2024; 34:4686-4696. [PMID: 38133674 DOI: 10.1007/s00330-023-10497-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 09/07/2023] [Accepted: 10/29/2023] [Indexed: 12/23/2023]
Abstract
OBJECTIVES To investigate the feasibility of non-contrast-enhanced MR angiography (NCE-MRA) in evaluating the morphology and blood supply of left gastric vein (LGV) in patients with gastroesophageal varices. METHODS Between March 2021 and October 2022, patients with gastroesophageal varices and who underwent NCE-MRA were retrospectively reviewed. In order to evaluate the blood supply of LGV, superior mesenteric vein (SMV) and splenic vein (SV) were visualized separately by using inflow-sensitive inversion recovery sequence. Two radiologists independently assessed the image quality, determined the origination and the blood supply of LGV, and measured the diameter of LGV. The origination and diameter of LGV were compared between NCE-MRA and contrast-enhanced CT. Differences in blood supply were compared between LGVs with different originations. RESULTS A total of 53 patients were enrolled in this study and the image quality was categorized as good or excellent in 52 patients. No significant differences were observed in visualizing the origination and the diameter of LGV between NCE-MRA and contrast-enhanced CT (p > .05). The blood supply of LGV was related to its origination (p < .001). Most LGVs with SV origination were supplied by SV. If LGV was originated from the portal vein (PV), about 70% of them were supplied by both SV and SMV. Compared with LGVs with SV origination, LGVs with PV origination showed more chance to receive blood from SMV (p < .001). CONCLUSION Non-contrast-enhanced MR angiography appears to be a reliable technique in evaluating the morphology and blood supply of LGV in patients with gastroesophageal varices. CLINICAL RELEVANCE STATEMENT Non-contrast-enhanced MR angiography provides valuable information for the management of gastroesophageal varices. Especially, it benefits patients with renal insufficiency. KEY POINTS • Non-contrast-enhanced MR angiography using inflow-sensitive inversion recovery technique can be used for evaluating not only morphology as CT but also blood supply of left gastric vein. • The blood supply of left gastric vein is related to its origination and left gastric vein with portal vein origination shows more chance to receive blood from superior mesenteric vein.
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Affiliation(s)
- Xianlun Zou
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, Hubei, China
| | - Lisi Liu
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, Hubei, China
| | - Fangqin Tan
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, Hubei, China
| | - Hao Tang
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, Hubei, China
| | - Daoyu Hu
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, Hubei, China
| | - Zhen Li
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, Hubei, China
| | - Qiuxia Wang
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, Hubei, China.
| | - Yaqi Shen
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, Hubei, China.
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Hyodo R, Takehara Y, Ishizu Y, Nishida K, Mizuno T, Ichikawa K, Horiguchi R, Kurata N, Ogura Y, Yokoyama S, Naganawa S, Jin N, Ichiba Y. Evaluation of 4D Flow MRI-Derived Relative Residence Time as a Marker for Cirrhosis Associated Portal Vein Thrombosis. J Magn Reson Imaging 2024. [PMID: 38490816 DOI: 10.1002/jmri.29357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Revised: 03/04/2024] [Accepted: 03/06/2024] [Indexed: 03/17/2024] Open
Abstract
BACKGROUND Portal vein thrombosis (PVT) is thought to arise from stagnant blood flow, yet conclusive evidence is lacking. Relative residence time (RRT) assessed using 4D Flow MRI may offer insight into portal flow stagnation. PURPOSE To explore the relationship between RRT values and the presence of PVT in cirrhotic participants. STUDY TYPE Prospective. POPULATION Forty-eight participants with liver cirrhosis (27 males, median age 67 years [IQR: 57-73]) and 20 healthy control participants (12 males, median age 45 years [IQR: 40-54]). FIELD STRENGTH/SEQUENCE 3 T/4D Flow MRI. ASSESSMENT Laboratory (liver and kidney function test results and platelet count) and clinical data (presence of tumors and other imaging findings), and portal hemodynamics derived from 4D Flow MRI (spatiotemporally averaged RRT [RRT-mean], flow velocity, and flow rate) were analyzed. STATISTICAL TESTS We used multivariable logistic regression, adjusted by selected covariates through the Lasso method, to explore whether RRT-mean is an independent risk factor for PVT. The area under the ROC curve (AUC) was also calculated to assess the model's discriminative ability. P < 0.05 indicated statistical significance. RESULTS The liver cirrhosis group consisted of 16 participants with PVT and 32 without PVT. Higher RRT-mean values (odds ratio [OR] 11.4 [95% CI: 2.19, 118]) and lower platelet count (OR 0.98 per 1000 μL [95% CI: 0.96, 0.99]) were independent risk factors for PVT. The incorporation of RRT-mean (AUC, 0.77) alongside platelet count (AUC, 0.75) resulted in an AUC of 0.84. When including healthy control participants, RRT-mean had an adjusted OR of 12.4 and the AUC of the combined model (RRT-mean and platelet count) was 0.90. DATA CONCLUSION Prolonged RRT values and low platelet count were significantly associated with the presence of PVT in cirrhotic participants. RRT values derived from 4D Flow MRI may have potential clinical relevance in the management of PVT. EVIDENCE LEVEL 2 TECHNICAL EFFICACY: Stage 2.
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Affiliation(s)
- Ryota Hyodo
- Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yasuo Takehara
- Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
- Department of Fundamental Development for Advanced Low Invasive Diagnostic Imaging, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yoji Ishizu
- Department of Gastroenterology and Hepatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Kazuki Nishida
- Center for Advanced Medicine and Clinical Research Department of Advanced Medicine, Nagoya University Hospital, Nagoya, Japan
| | - Takashi Mizuno
- Department of Radiological Technology, Nagoya University Hospital, Nagoya, Japan
| | - Kazushige Ichikawa
- Department of Radiological Technology, Nagoya University Hospital, Nagoya, Japan
| | - Ryota Horiguchi
- Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Nobuhiko Kurata
- Department of Transplantation Surgery, Nagoya University Hospital, Nagoya, Japan
| | - Yasuhiro Ogura
- Department of Transplantation Surgery, Nagoya University Hospital, Nagoya, Japan
| | - Shinya Yokoyama
- Department of Gastroenterology and Hepatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Shinji Naganawa
- Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Ning Jin
- Siemens Medical Solutions USA Inc., Malvern, Pennsylvania, USA
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Ristow I, Riedel C, Lenz A, Well L, Adam G, Panuccio G, Kölbel T, Bannas P. Current Imaging Strategies in Patients with Abdominal Aortic Aneurysms. ROFO-FORTSCHR RONTG 2024; 196:52-61. [PMID: 37699431 DOI: 10.1055/a-2119-6448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/14/2023]
Abstract
BACKGROUND An abdominal aortic aneurysm (AAA) is defined as a localized dilatation of the abdominal aorta of ≥ 3 cm. With a prevalence of 4-8 %, AAA is one of the most common vascular diseases in Western society. Radiological imaging is an elementary component in the diagnosis, monitoring, and treatment planning of AAA patients. METHOD This is a narrative review article on preoperative imaging strategies of AAA, incorporating expert opinions based on the current literature and standard-of-care practices from our own center. Examples are provided to illustrate clinical cases from our institution. RESULTS AND CONCLUSION Radiological imaging plays a pivotal role in the initial diagnosis and monitoring of patients with AAA. Ultrasound is the mainstay imaging modality for AAA screening and surveillance. Contrast-enhanced CT angiography is currently considered the gold standard for preoperative imaging and image-based treatment planning in AAA repair. New non-contrast MR angiography techniques are robustly applicable and allow precise determination of aortic diameters, which is of critical importance, particularly with regard to current diameter-based surgical treatment guidelines. 3D imaging with multiplanar reformation and automatic centerline positioning enables more accurate assessment of the maximum aortic diameter. Modern imaging techniques such as 4D flow MRI have the potential to further improve individualized risk stratification in patients with AAA. KEY POINTS · Ultrasound is the mainstay imaging modality for AAA screening and monitoring. · Contrast-enhanced CT angiography is the gold standard for preoperative imaging in AAA repair. · Non-contrast MR angiography allows for accurate monitoring of aortic diameters in AAA patients. · Measurement of aortic diameters is more accurate with 3D-CT/MRI compared to ultrasound. · Research seeks new quantitative imaging biomarkers for AAA risk stratification, e. g., using 4D flow MRI.
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Affiliation(s)
- Inka Ristow
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Christoph Riedel
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Alexander Lenz
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Lennart Well
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Gerhard Adam
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Giuseppe Panuccio
- German Aortic Center Hamburg, Department of Vascular Medicine, University Medical Center Hamburg-Eppendorf University Heart & Vascular Center, Hamburg, Germany
| | - Tilo Kölbel
- German Aortic Center Hamburg, Department of Vascular Medicine, University Medical Center Hamburg-Eppendorf University Heart & Vascular Center, Hamburg, Germany
| | - Peter Bannas
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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Hyodo R, Takehara Y, Mizuno T, Ichikawa K, Horiguchi R, Kawakatsu S, Mizuno T, Ebata T, Naganawa S, Jin N, Ichiba Y. Four-dimensional Flow MRI Assessment of Portal Hemodynamics and Hepatic Regeneration after Portal Vein Embolization. Radiology 2023; 308:e230709. [PMID: 37750777 DOI: 10.1148/radiol.230709] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/27/2023]
Abstract
Background Percutaneous transhepatic portal vein (PV) embolization (PVE) is a standard preoperative procedure for advanced biliary cancer when the future liver remnant (FLR) is insufficient, yet the effect of this procedure on portal hemodynamics is still unclear. Purpose To assess whether four-dimensional (4D) MRI flowmetry can be used to estimate FLR volume and to identify the optimal time for this measurement. Materials and Methods This prospective single-center study enrolled consecutive adult patients with biliary cancer who underwent percutaneous transhepatic PVE for the right liver between June 2020 and November 2022. Portal hemodynamics were assessed using 4D flow MRI before PVE and within 1 day (0-day group) or 3-4 days (3-day group) after PVE. FLR volume was measured using CT before PVE and after PVE but before surgery. Blood flow changes were analyzed with the Wilcoxon signed rank test, and correlations with Spearman rank correlation. Results The 0-day group included 24 participants (median age, 72 years [IQR, 69-77 years]; 17 male participants), and the 3-day group included 13 participants (median age, 71 years [IQR, 68-78 years]; eight male participants). Both groups showed increased left PV (LPV) flow rate after PVE (0-day group: from median 3.72 mL/sec [IQR, 2.83-4.55 mL/sec] to 9.48 mL/sec [IQR, 8.12-10.7 mL/sec], P < .001; 3-day group: from median 3.65 mL/sec [IQR, 2.14-3.79 mL/sec] to 8.16 mL/sec [IQR, 6.82-8.98 mL/sec], P < .001). LPV flow change correlated with FLR volume change relative to the number of days from PVE to presurgery CT only in the 3-day group (ρ = 0.62, P = .02; 0-day group, P = .11). The output of the regression equation for estimating presurgery FLR volume correlated with CT-measured volume (ρ = 0.78; P = .002). Conclusion Four-dimensional flow MRI demonstrated increased blood flow in residual portal branches 3-4 days after PVE, offering insights for estimating presurgery FLR volume. Published under a CC BY 4.0 license. Supplemental material is available for this article. See also the editorial by Roldán-Alzate and Oechtering in this issue.
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Affiliation(s)
- Ryota Hyodo
- From the Department of Radiology (R. Hyodo, Y.T., S.N.), Department of Fundamental Development for Advanced Low Invasive Diagnostic Imaging (Y.T.), and Department of Surgery (S.K., T.M.[2], T.E.), Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan; Department of Radiological Technology, Nagoya University Hospital, Nagoya, Japan (T.M.[1], K.I.); Department of Radiology, Yokkaichi Municipal Hospital, Yokkaichi, Japan (R. Horiguchi); Siemens Medical Solutions USA, Malvern, Pa (J.N.); and Siemens Healthcare, Tokyo, Japan (Y.I.)
| | - Yasuo Takehara
- From the Department of Radiology (R. Hyodo, Y.T., S.N.), Department of Fundamental Development for Advanced Low Invasive Diagnostic Imaging (Y.T.), and Department of Surgery (S.K., T.M.[2], T.E.), Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan; Department of Radiological Technology, Nagoya University Hospital, Nagoya, Japan (T.M.[1], K.I.); Department of Radiology, Yokkaichi Municipal Hospital, Yokkaichi, Japan (R. Horiguchi); Siemens Medical Solutions USA, Malvern, Pa (J.N.); and Siemens Healthcare, Tokyo, Japan (Y.I.)
| | - Takashi Mizuno
- From the Department of Radiology (R. Hyodo, Y.T., S.N.), Department of Fundamental Development for Advanced Low Invasive Diagnostic Imaging (Y.T.), and Department of Surgery (S.K., T.M.[2], T.E.), Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan; Department of Radiological Technology, Nagoya University Hospital, Nagoya, Japan (T.M.[1], K.I.); Department of Radiology, Yokkaichi Municipal Hospital, Yokkaichi, Japan (R. Horiguchi); Siemens Medical Solutions USA, Malvern, Pa (J.N.); and Siemens Healthcare, Tokyo, Japan (Y.I.)
| | - Kazushige Ichikawa
- From the Department of Radiology (R. Hyodo, Y.T., S.N.), Department of Fundamental Development for Advanced Low Invasive Diagnostic Imaging (Y.T.), and Department of Surgery (S.K., T.M.[2], T.E.), Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan; Department of Radiological Technology, Nagoya University Hospital, Nagoya, Japan (T.M.[1], K.I.); Department of Radiology, Yokkaichi Municipal Hospital, Yokkaichi, Japan (R. Horiguchi); Siemens Medical Solutions USA, Malvern, Pa (J.N.); and Siemens Healthcare, Tokyo, Japan (Y.I.)
| | - Ryota Horiguchi
- From the Department of Radiology (R. Hyodo, Y.T., S.N.), Department of Fundamental Development for Advanced Low Invasive Diagnostic Imaging (Y.T.), and Department of Surgery (S.K., T.M.[2], T.E.), Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan; Department of Radiological Technology, Nagoya University Hospital, Nagoya, Japan (T.M.[1], K.I.); Department of Radiology, Yokkaichi Municipal Hospital, Yokkaichi, Japan (R. Horiguchi); Siemens Medical Solutions USA, Malvern, Pa (J.N.); and Siemens Healthcare, Tokyo, Japan (Y.I.)
| | - Shoji Kawakatsu
- From the Department of Radiology (R. Hyodo, Y.T., S.N.), Department of Fundamental Development for Advanced Low Invasive Diagnostic Imaging (Y.T.), and Department of Surgery (S.K., T.M.[2], T.E.), Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan; Department of Radiological Technology, Nagoya University Hospital, Nagoya, Japan (T.M.[1], K.I.); Department of Radiology, Yokkaichi Municipal Hospital, Yokkaichi, Japan (R. Horiguchi); Siemens Medical Solutions USA, Malvern, Pa (J.N.); and Siemens Healthcare, Tokyo, Japan (Y.I.)
| | - Takashi Mizuno
- From the Department of Radiology (R. Hyodo, Y.T., S.N.), Department of Fundamental Development for Advanced Low Invasive Diagnostic Imaging (Y.T.), and Department of Surgery (S.K., T.M.[2], T.E.), Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan; Department of Radiological Technology, Nagoya University Hospital, Nagoya, Japan (T.M.[1], K.I.); Department of Radiology, Yokkaichi Municipal Hospital, Yokkaichi, Japan (R. Horiguchi); Siemens Medical Solutions USA, Malvern, Pa (J.N.); and Siemens Healthcare, Tokyo, Japan (Y.I.)
| | - Tomoki Ebata
- From the Department of Radiology (R. Hyodo, Y.T., S.N.), Department of Fundamental Development for Advanced Low Invasive Diagnostic Imaging (Y.T.), and Department of Surgery (S.K., T.M.[2], T.E.), Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan; Department of Radiological Technology, Nagoya University Hospital, Nagoya, Japan (T.M.[1], K.I.); Department of Radiology, Yokkaichi Municipal Hospital, Yokkaichi, Japan (R. Horiguchi); Siemens Medical Solutions USA, Malvern, Pa (J.N.); and Siemens Healthcare, Tokyo, Japan (Y.I.)
| | - Shinji Naganawa
- From the Department of Radiology (R. Hyodo, Y.T., S.N.), Department of Fundamental Development for Advanced Low Invasive Diagnostic Imaging (Y.T.), and Department of Surgery (S.K., T.M.[2], T.E.), Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan; Department of Radiological Technology, Nagoya University Hospital, Nagoya, Japan (T.M.[1], K.I.); Department of Radiology, Yokkaichi Municipal Hospital, Yokkaichi, Japan (R. Horiguchi); Siemens Medical Solutions USA, Malvern, Pa (J.N.); and Siemens Healthcare, Tokyo, Japan (Y.I.)
| | - Ning Jin
- From the Department of Radiology (R. Hyodo, Y.T., S.N.), Department of Fundamental Development for Advanced Low Invasive Diagnostic Imaging (Y.T.), and Department of Surgery (S.K., T.M.[2], T.E.), Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan; Department of Radiological Technology, Nagoya University Hospital, Nagoya, Japan (T.M.[1], K.I.); Department of Radiology, Yokkaichi Municipal Hospital, Yokkaichi, Japan (R. Horiguchi); Siemens Medical Solutions USA, Malvern, Pa (J.N.); and Siemens Healthcare, Tokyo, Japan (Y.I.)
| | - Yoshito Ichiba
- From the Department of Radiology (R. Hyodo, Y.T., S.N.), Department of Fundamental Development for Advanced Low Invasive Diagnostic Imaging (Y.T.), and Department of Surgery (S.K., T.M.[2], T.E.), Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan; Department of Radiological Technology, Nagoya University Hospital, Nagoya, Japan (T.M.[1], K.I.); Department of Radiology, Yokkaichi Municipal Hospital, Yokkaichi, Japan (R. Horiguchi); Siemens Medical Solutions USA, Malvern, Pa (J.N.); and Siemens Healthcare, Tokyo, Japan (Y.I.)
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Shamim AMKM, Panagiotopoulos N, Spahic A, Harris DT, Roldán-Alzate A, Wieben O, Reeder SB, Oechtering TH, Johnson KM. Fat mitigation strategies to improve image quality of radial 4D flow MRI in obese subjects. Magn Reson Med 2023; 90:444-457. [PMID: 37036023 PMCID: PMC10231668 DOI: 10.1002/mrm.29652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 02/10/2023] [Accepted: 03/14/2023] [Indexed: 04/11/2023]
Abstract
PURPOSE This study addresses the challenges in obtaining abdominal 4D flow MRI of obese patients. We aimed to evaluate spectral saturation and inner volume excitation as methods to mitigating artifacts originating from adipose signals, with the goal of enhancing image quality and improving quantification. METHODS Radial 4D flow MRI acquisitions with fat mitigation (inner volume excitation [IVE] and intermittent fat saturation [FS]) were compared to a standard slab selective excitation (SSE) in a test-retest study of 15 obese participants. IVE selectively excited a cylindrical region of interest, avoiding contamination from peripheral adipose tissue, while FS globally suppressed fat based on spectral selection. Acquisitions were evaluated qualitatively based on expert ratings and quantitatively based on conservation of mass, test-retest repeatability, and a divergence free quality metric. Errors were evaluated statistically using the absolute and relative errors, regression, and Bland-Altman analysis. RESULTS IVE demonstrated superior performance quantitatively in the conservation of mass analysis in the portal vein, with higher correlation and lower bias in regression analysis. IVE also produced flow fields with the lowest divergence error and was rated best in overall image quality, delineating small vessels, and producing the least streaking artifacts. Evaluation results did not differ significantly between FS and SSE. Test-retest reproducibility was similarly high for all sequences, with data suggesting biological variations dominate the technical variability. CONCLUSION IVE improved hemodynamic assessment of radial 4D flow MRI in the abdomen of obese participants while FS did not lead to significant improvements in image quality or flow metrics.
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Affiliation(s)
- A M K Muntasir Shamim
- Department of Electrical and Computer Engineering, University of Wisconsin, Madison, Wisconsin, USA
| | - Nikolaos Panagiotopoulos
- Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
- Universität zu Lübeck, Department of Radiology and Nuclear Medicine, Lübeck, Germany
| | - Alma Spahic
- Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
| | - David T. Harris
- Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Alejandro Roldán-Alzate
- Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
- Department of Biomedical Engineering, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
- Department of Mechanical Engineering, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Oliver Wieben
- Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
- Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Scott B. Reeder
- Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
- Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
- Department of Biomedical Engineering, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
- Department of Mechanical Engineering, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
- Department of Emergency Medicine, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Thekla Helene Oechtering
- Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
- Universität zu Lübeck, Department of Radiology and Nuclear Medicine, Lübeck, Germany
| | - Kevin M. Johnson
- Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
- Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
- Department of Biomedical Engineering, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
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Maroun A, Quinn S, Dushfunian D, Weiss EK, Allen BD, Carr JC, Markl M. Clinical Applications of Four-Dimensional Flow MRI. Magn Reson Imaging Clin N Am 2023; 31:451-460. [PMID: 37414471 DOI: 10.1016/j.mric.2023.04.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/08/2023]
Abstract
Four-dimensional flow MRI is a powerful phase contrast technique used for assessing three-dimensional (3D) blood flow dynamics. By acquiring a time-resolved velocity field, it enables flexible retrospective analysis of blood flow that can include qualitative 3D visualization of complex flow patterns, comprehensive assessment of multiple vessels, reliable placement of analysis planes, and calculation of advanced hemodynamic parameters. This technique provides several advantages over routine two-dimensional flow imaging techniques, allowing it to become part of clinical practice at major academic medical centers. In this review, we present the current state-of-the-art cardiovascular, neurovascular, and abdominal applications.
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Affiliation(s)
- Anthony Maroun
- Department of Radiology, Northwestern University, Feinberg School of Medicine, 737 North Michigan Avenue Suite 1600, Chicago, IL 60611, USA.
| | - Sandra Quinn
- Department of Radiology, Northwestern University, Feinberg School of Medicine, 737 North Michigan Avenue Suite 1600, Chicago, IL 60611, USA
| | - David Dushfunian
- Department of Radiology, Northwestern University, Feinberg School of Medicine, 737 North Michigan Avenue Suite 1600, Chicago, IL 60611, USA
| | - Elizabeth K Weiss
- Department of Radiology, Northwestern University, Feinberg School of Medicine, 737 North Michigan Avenue Suite 1600, Chicago, IL 60611, USA
| | - Bradley D Allen
- Department of Radiology, Northwestern University, Feinberg School of Medicine, 737 North Michigan Avenue Suite 1600, Chicago, IL 60611, USA
| | - James C Carr
- Department of Radiology, Northwestern University, Feinberg School of Medicine, 737 North Michigan Avenue Suite 1600, Chicago, IL 60611, USA
| | - Michael Markl
- Department of Radiology, Northwestern University, Feinberg School of Medicine, 737 North Michigan Avenue Suite 1600, Chicago, IL 60611, USA
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Balducci D, Montori M, De Blasio F, Di Bucchianico A, Argenziano ME, Baroni GS, Scarpellini E. The Role of Transjugular Intrahepatic Portosystemic Shunt (TIPS) in Treating Portal Hypertension in Patients with Hepatocellular Carcinoma. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:1150. [PMID: 37374354 PMCID: PMC10304577 DOI: 10.3390/medicina59061150] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 06/05/2023] [Accepted: 06/13/2023] [Indexed: 06/29/2023]
Abstract
Liver cancer is very frequent, and hepatocellular carcinoma (HCC) accounts for the majority of liver cancer cases. Its growing incidence has been greatly affected by the increasing prevalence of metabolic-associated fatty liver disease (MAFLD). The latter is a new epidemic in our era. In fact, HCC is often generated from noncirrhotic liver and its treatment benefits from surgical and nonsurgical approaches, potentially bridged by transjugular intrahepatic portosystemic shunt (TIPS) use. TIPS use is an effective treatment for portal hypertension complications, but its application in patients with HCC and clinically significant portal hypertension (CSPH) remains controversial due to concerns about tumor rupture, dissemination, and increased toxicity. The technical feasibility and safety of TIPS use in HCC patients have been evaluated in several studies. Despite concerns about intraprocedural complications, retrospective studies have shown high success rates and low complication rates in TIPS placement for HCC patients. TIPS use in combination with locoregional treatments, such as transarterial chemoembolization (TACE) or transarterial radioembolization (TARE), has been explored as a treatment option for HCC patients with portal hypertension. These studies have shown improved survival rates in patients undergoing TIPS in combination with locoregional treatments. However, the efficacy and toxicity of TACE in combination with TIPS use require careful evaluation, as changes in venous and arterial flow can affect treatment outcomes and complications. The results from studies evaluating the impact of TIPS on systemic therapy and surgical options are also promising. In conclusion, the TIPS is a sufficiently safe, useful item available for physicians treating complications of portal hypertension. Moreover, a TIPS can be used in combination with locoregional therapy in HCC patients. Systemic chemotherapy can also benefit of the use of TIPS placement. A complex interplay affects TIPS use with surgery. The latter needs further data. The TIPS is a useful and safe add-on treatment, changing the natural course of HCC progression. Its use is regulated by a sophisticated physiologic and pathophysiologic flow of evidence.
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Affiliation(s)
- Daniele Balducci
- Clinic of Gastroenterology, Hepatology and Emergency Digestive Endoscopy, Università Politecnica delle Marche, 60126 Ancona, Italy
| | - Michele Montori
- Clinic of Gastroenterology, Hepatology and Emergency Digestive Endoscopy, Università Politecnica delle Marche, 60126 Ancona, Italy
| | - Federico De Blasio
- Clinic of Gastroenterology, Hepatology and Emergency Digestive Endoscopy, Università Politecnica delle Marche, 60126 Ancona, Italy
| | - Alessandro Di Bucchianico
- Clinic of Gastroenterology, Hepatology and Emergency Digestive Endoscopy, Università Politecnica delle Marche, 60126 Ancona, Italy
| | - Maria Eva Argenziano
- Clinic of Gastroenterology, Hepatology and Emergency Digestive Endoscopy, Università Politecnica delle Marche, 60126 Ancona, Italy
| | | | - Emidio Scarpellini
- Clinical Nutrition Unit and Internal Medicine Unit, “Madonna del Soccorso” General Hospital, Via Luciano Manara 7, 63074 San Benedetto del Tronto, Italy
- Translational Research Center for Gastrointestinal Disease (T.A.R.G.I.D.), Gasthuisberg University Hospital, KULeuven, Herestraat 49, 3000 Lueven, Belgium
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8
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Huang A, Roberts GS, Roldán-Alzate A, Wieben O, Reeder SB, Oechtering TH. Reference values for 4D flow magnetic resonance imaging of the portal venous system. Abdom Radiol (NY) 2023; 48:2049-2059. [PMID: 37016247 PMCID: PMC10518803 DOI: 10.1007/s00261-023-03892-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 03/17/2023] [Accepted: 03/19/2023] [Indexed: 04/06/2023]
Abstract
PURPOSE The purpose of this work was to establish normal reference values for 4D flow MRI-derived flow, velocity, and vessel diameters, and to define characteristic flow patterns in the portal venous system of healthy adult subjects. METHODS For this retrospective study, we screened all available 4D flow MRI exams of the upper abdomen in healthy adults acquired at our institution between 2012 and 2022 at either 1.5 T or 3.0 T MRI after ≥ 5 h fasting. Flow, velocity, and effective diameter were quantified in the 8 planes in the portal venous system (splenic vein, superior mesenteric vein, main, right, and left portal veins). Vessel delineation was manually adjusted over time. Reference ranges for were defined as the mean ± 2 standard deviations. Three readers noted helical and vortical flow on time-resolved pathline visualizations. Conservation of mass flow analysis was performed for quality assurance. RESULTS We included 44 healthy subjects (26 female, 18-74 years) in the analysis. We report reference values for mean and peak flow, mean velocity, and vessel diameter in the healthy portal vein using 4D flow MRI. Normal flow patterns in the portal vein included faint helical (66%) or linear flow (34%). Conservation of mass analysis demonstrated a relative error of 1.1 ± 4.6% standard deviation (SD) at the splenomesenteric confluence and - 1.4 ± 4.1% SD at the portal bifurcation. CONCLUSION We have reported normal hemodynamic values that are necessary baseline data for emerging clinical applications of 4D flow MRI in the portal venous system. Results are consistent with previously published values from smaller cohorts.
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Affiliation(s)
- Andrew Huang
- Department of Radiology, University of Wisconsin, Madison, WI, USA
- Section of Vascular Surgery, Department of Surgery, University of Michigan, Ann Arbor, MI, USA
| | - Grant S Roberts
- Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Alejandro Roldán-Alzate
- Department of Mechanical Engineering, University of Wisconsin, Madison, WI, USA
- Department of Biomedical Engineering, University of Wisconsin, Madison, WI, USA
| | - Oliver Wieben
- Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Scott B Reeder
- Department of Radiology, University of Wisconsin, Madison, WI, USA
- Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
- Department of Biomedical Engineering, University of Wisconsin, Madison, WI, USA
- Department of Medicine, University of Wisconsin, Madison, WI, USA
- Department of Emergency Medicine, University of Wisconsin, Madison, WI, USA
| | - Thekla H Oechtering
- Department of Radiology, University of Wisconsin, Madison, WI, USA.
- Department of Radiology and Nuclear Medicine, Universität zu Lübeck, Lübeck, Germany.
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9
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Riedel C, Ristow I, Lenz A, Schoennagel BP, Hoffmann M, Piecha F, Adam G, Reeder SB, Bannas P. Validation of 4D flow cardiovascular magnetic resonance in TIPS stent grafts using a 3D-printed flow phantom. J Cardiovasc Magn Reson 2023; 25:9. [PMID: 36775827 PMCID: PMC9923912 DOI: 10.1186/s12968-023-00920-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 01/16/2023] [Indexed: 02/14/2023] Open
Abstract
BACKGROUND Four-dimensional (4D) flow cardiovascular magnetic resonance (CMR) is feasible for portal blood flow evaluation after placement of transjugular intrahepatic portosystemic shunts (TIPS) in patients with liver cirrhosis. However, clinical acceptance of 4D flow CMR in TIPS patients is limited due to the lack of validation studies. The purpose of this study was to validate 4D flow CMR-derived measurements in TIPS stent grafts using a three-dimensional (3D)-printed flow phantom. METHODS A translucent flow phantom of the portal vasculature was 3D-printed. The phantom consisted of the superior mesenteric vein and the splenic vein draining into the portal vein, the TIPS-tract, and the hepatic vein. A TIPS stent graft (Gore® Viatorr®) was positioned within the TIPS-tract. Superior mesenteric vein and splenic vein served as inlets for blood-mimicking fluid. 4D flow CMR acquisitions were performed at 3T at preset flow rates of 0.8 to 2.8 l/min using velocity encoding of both 1.0 and 2.0 m/s. Flow rates and velocities were measured at predefined levels in the portal vasculature and within the stent graft. Accuracy of 4D flow CMR was assessed through linear regression with reference measurements obtained by flow sensors and two-dimensional (2D) phase contrast (PC) CMR. Intra- and interobserver agreement were assessed through Bland-Altman analyses. RESULTS At a velocity encoding of 2.0 m/s, 4D flow CMR-derived flow rates and velocities showed an excellent correlation with preset flow rates and 2D PC CMR-derived flow velocities at all vascular levels and within the stent graft (all r ≥ 0.958, p ≤ 0.003). At a velocity encoding of 1.0 m/s, aliasing artifacts were present within the stent graft at flow rates ≥ 2.0 l/min. 4D flow CMR-derived measurements revealed high intra- and interobserver agreement. CONCLUSIONS The in vitro accuracy and precision of 4D flow CMR is unaffected by the presence of TIPS stent grafts, suggesting that 4D flow CMR may be used to monitor TIPS patency in patients with liver cirrhosis.
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Affiliation(s)
- Christoph Riedel
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany.
| | - Inka Ristow
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
| | - Alexander Lenz
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
| | - Bjoern P Schoennagel
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
| | - Marko Hoffmann
- Institute of Multiphase Flows, Hamburg University of Technology, Hamburg, Germany
| | - Felix Piecha
- I. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Gerhard Adam
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
| | - Scott B Reeder
- Department of Radiology, University of Wisconsin-Madison, Madison, WI, USA
- Department of Medical Physics, University of Wisconsin-Madison, Madison, WI, USA
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI, USA
- Department of Medicine, University of Wisconsin-Madison, Madison, WI, USA
- Department of Emergency Medicine, University of Wisconsin-Madison, Madison, WI, USA
| | - Peter Bannas
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
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10
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Liver cirrhosis: relationship between fibrosis-associated hepatic morphological changes and portal hemodynamics using four-dimensional flow magnetic resonance imaging. Jpn J Radiol 2023; 41:625-636. [PMID: 36656540 DOI: 10.1007/s11604-023-01388-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 01/04/2023] [Indexed: 01/20/2023]
Abstract
PURPOSE The mechanisms underlying the morphological changes in liver cirrhosis remain unknown. This study aimed to clarify the relationship between fibrotic hepatic morphology and portal hemodynamic changes using four-dimensional flow magnetic resonance imaging (MRI). MATERIALS AND METHODS Overall, 100 patients with suspected liver disease who underwent 3-T MRI were evaluated in this retrospective study. Liver fibrosis was assessed using a combination of visual assessment of the hepatic morphology and quantitative measures, including the fibrosis-4 index and aspartate transaminase-to-platelet ratio. It was classified into three groups according to the severity of fibrosis as follows: A (normal), B (mild-to-moderate), and C (severe). Quantitative indices, including area (mm2), net flow (mL/s), and average velocity (cm/s), were measured in the right portal vein (RPV) and left portal vein (LPV), and were compared across the groups using the Kruskal-Wallis and Mann-Whitney U tests. RESULTS Among the 100 patients (69.1 ± 12.1 years; 59 men), 45, 35, and 20 were categorized into groups A, B, and C, respectively. The RPV area significantly differed among the groups (from p < 0.001 to p = 0.001), showing a gradual decrease with fibrosis progression. Moreover, the net flow significantly differed between groups A and B and between groups A and C (p < 0.001 and p < 0.001, respectively), showing a decrease during the early stage of fibrosis. In the LPV, the net flow significantly differed among the groups (from p = 0.001 to p = 0.030), revealing a gradual increase with fibrosis progression. CONCLUSION The atrophy-hypertrophy complex, which is a characteristic imaging finding in advanced cirrhosis, was closely associated with decreased RPV flow in the early stage of fibrosis and a gradual increase in LPV flow across all stages of fibrosis progression.
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11
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Bane O, Stocker D, Kennedy P, Hectors SJ, Bollache E, Schnell S, Schiano T, Thung S, Fischman A, Markl M, Taouli B. 4D flow MRI in abdominal vessels: prospective comparison of k-t accelerated free breathing acquisition to standard respiratory navigator gated acquisition. Sci Rep 2022; 12:19886. [PMID: 36400918 PMCID: PMC9674613 DOI: 10.1038/s41598-022-23864-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 11/07/2022] [Indexed: 11/19/2022] Open
Abstract
Volumetric phase-contrast magnetic resonance imaging with three-dimensional velocity encoding (4D flow MRI) has shown utility as a non-invasive tool to examine altered blood flow in chronic liver disease. Novel 4D flow MRI pulse sequences with spatio-temporal acceleration can mitigate the long acquisition times of standard 4D flow MRI, which are an impediment to clinical adoption. The purpose of our study was to demonstrate feasibility of a free-breathing, spatio-temporal (k-t) accelerated 4D flow MRI acquisition for flow quantification in abdominal vessels and to compare its image quality, flow quantification and inter-observer reproducibility with a standard respiratory navigator-gated 4D flow MRI acquisition. Ten prospectively enrolled patients (M/F: 7/3, mean age = 58y) with suspected portal hypertension underwent both 4D flow MRI acquisitions. The k-t accelerated acquisition was approximately three times faster (3:11 min ± 0:12 min/9:17 min ± 1:41 min, p < 0.001) than the standard respiratory-triggered acquisition. Vessel identification agreement was substantial between acquisitions and observers. Average flow had substantial inter-sequence agreement in the portal vein and aorta (CV < 15%) and poorer agreement in hepatic and splenic arteries (CV = 11-38%). The k-t accelerated acquisition recorded reduced velocities in small arteries and reduced splenic vein flow. Respiratory gating combined with increased acceleration and spatial resolution are needed to improve flow measurements in these vessels.
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Affiliation(s)
- Octavia Bane
- grid.59734.3c0000 0001 0670 2351Department of Diagnostic, Molecular and Interventional Radiology, Icahn School of Medicine at Mount Sinai, 1470 Madison Avenue, New York, NY 10029 USA ,grid.59734.3c0000 0001 0670 2351BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, NY USA
| | - Daniel Stocker
- grid.59734.3c0000 0001 0670 2351Department of Diagnostic, Molecular and Interventional Radiology, Icahn School of Medicine at Mount Sinai, 1470 Madison Avenue, New York, NY 10029 USA ,grid.59734.3c0000 0001 0670 2351BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, NY USA
| | - Paul Kennedy
- grid.59734.3c0000 0001 0670 2351Department of Diagnostic, Molecular and Interventional Radiology, Icahn School of Medicine at Mount Sinai, 1470 Madison Avenue, New York, NY 10029 USA ,grid.59734.3c0000 0001 0670 2351BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, NY USA
| | - Stefanie J. Hectors
- grid.59734.3c0000 0001 0670 2351Department of Diagnostic, Molecular and Interventional Radiology, Icahn School of Medicine at Mount Sinai, 1470 Madison Avenue, New York, NY 10029 USA ,grid.59734.3c0000 0001 0670 2351BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, NY USA
| | - Emilie Bollache
- grid.16753.360000 0001 2299 3507Department of Biomedical Engineering, McCormick School of Engineering, Northwestern University, Evanston, IL USA ,grid.7429.80000000121866389Laboratoire d’Imagerie Biomédicale, INSERM, Paris, France
| | - Susanne Schnell
- grid.16753.360000 0001 2299 3507Department of Biomedical Engineering, McCormick School of Engineering, Northwestern University, Evanston, IL USA ,grid.5603.0Department of Medical Physics, Universität Greifswald, Greifswald, Germany
| | - Thomas Schiano
- grid.59734.3c0000 0001 0670 2351Recanati/Miller Transplantation Institute, Icahn School of Medicine at Mount Sinai, New York, NY USA
| | - Swan Thung
- grid.59734.3c0000 0001 0670 2351Department of Pathology, Icahn School of Medicine at Mount Sinai, New York, NY USA
| | - Aaron Fischman
- grid.59734.3c0000 0001 0670 2351Department of Diagnostic, Molecular and Interventional Radiology, Icahn School of Medicine at Mount Sinai, 1470 Madison Avenue, New York, NY 10029 USA
| | - Michael Markl
- grid.16753.360000 0001 2299 3507Department of Biomedical Engineering, McCormick School of Engineering, Northwestern University, Evanston, IL USA ,grid.16753.360000 0001 2299 3507Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL USA
| | - Bachir Taouli
- grid.59734.3c0000 0001 0670 2351Department of Diagnostic, Molecular and Interventional Radiology, Icahn School of Medicine at Mount Sinai, 1470 Madison Avenue, New York, NY 10029 USA ,grid.59734.3c0000 0001 0670 2351BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, NY USA
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12
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Hamasaki M, Araki T, Tamada D, Morisaka H, Johno H, Aikawa Y, Onishi H. Four-dimensional flow magnetic resonance imaging for assessment of hemodynamic changes in the portal venous system before and after balloon-occluded retrograde transvenous obliteration: a pilot feasibility study. Acta Radiol 2022; 64:1462-1468. [PMID: 36325676 DOI: 10.1177/02841851221133487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Background The effectiveness of four-dimensional (4D) flow magnetic resonance imaging (MRI) for assessing hemodynamic changes before and after balloon-occluded retrograde transvenous obliteration (BRTO) remains unclear. Purpose To evaluate the feasibility of 4D flow MRI for assessing hemodynamic changes in the portal venous system before and after BRTO. Material and Methods We included 10 patients (7 men, 3 women; mean age = 67 years) with liver cirrhosis who had a high risk of gastric variceal bleeding or hepatic encephalopathy. Non-contrast 4D flow MRI of the upper abdomen was performed before and after BRTO. In addition, we compared the blood flow rates in the portal vein (PV), superior mesenteric vein (SMV), splenic vein (SV), left renal vein, and inferior vena cava before and after BRTO. Moreover, the flow directions of the SMV and SV before and after BRTO were assessed using both portography and 4D flow MRI. Results There was a significant post-BRTO increase in the blood flow rate in the PV and SV ( P < 0.05). There was no significant post-BRTO change in the blood flow rates in the SMV, inferior vena cava, and left renal vein. In four patients, portography confirmed that hepatofugal flow in the SV and SMV changed to hepatopetal flow after BRTO. Moreover, 4D flow MRI correctly assessed the flow directions in the SMV and SV in 70%–100% of the patients. Conclusion 4D flow MRI can be used to detect hemodynamic changes in the portal venous system before and after BRTO.
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Affiliation(s)
- Masahiro Hamasaki
- Department of Radiology, University of Yamanashi, Chuo-shi, Yamanashi, Japan
| | - Takuji Araki
- Department of Radiology, University of Yamanashi, Chuo-shi, Yamanashi, Japan
| | - Daiki Tamada
- Department of Radiology, University of Yamanashi, Chuo-shi, Yamanashi, Japan
| | - Hiroyuki Morisaka
- Department of Radiology, University of Yamanashi, Chuo-shi, Yamanashi, Japan
| | - Hisashi Johno
- Department of Radiology, University of Yamanashi, Chuo-shi, Yamanashi, Japan
| | - Yoshihito Aikawa
- Department of Radiology, University of Yamanashi, Chuo-shi, Yamanashi, Japan
| | - Hiroshi Onishi
- Department of Radiology, University of Yamanashi, Chuo-shi, Yamanashi, Japan
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13
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Yin K, Wang X, Zheng T. Computational hemodynamic analysis for optimal stent position in the transjugular intrahepatic portosystemic shunt procedure. J Biomech 2022; 143:111303. [PMID: 36126502 DOI: 10.1016/j.jbiomech.2022.111303] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 09/02/2022] [Accepted: 09/09/2022] [Indexed: 11/27/2022]
Abstract
Transjugular intrahepatic portosystemic shunt (TIPS) is an effective treatment for portal hypertension (PH). The current study aimed to investigate the effect of stent position on post-TIPS hemodynamic performance using computational fluid dynamics. Patient-specific pre- and post-TIPS models were reconstructed from CT images of two patients, then virtual TIPS models were created by shifting the portal vein (PV) entry site of the stent. Although there were marginal differences the effects of left-sided and right-sided TIPS on post-TIPS portal pressure and shunting flow, right-sided TIPS resulted in a greater proportion of superior mesenteric vein (SMV) flow diverting to stents compared to that for left-sided TIPS. The results also demonstrated that the nearer the entry site of stent to the portal venous bifurcation, the greater and more stable the shunting blood flow. These results suggest that the entry site of the stent should be as close to the portal vein bifurcation as possible during TIPS. TIPS on the right branch of the portal vein may be more likely to result in post-TIPS hepatic encephalopathy than that on the left branch.
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Affiliation(s)
- Keli Yin
- Department of Applied Mechanics, Sichuan University, Chengdu 610065, China; Sichuan University Yibin Park / Yibin Institute of Industrial Technology, Yibin 644000, China.
| | - Xiaoze Wang
- Department of Gastroenterology and Hepatology, Sichuan University-University of Oxford Huaxi Joint Centre for Gastrointestinal Cancer, West China Hospital, Sichuan University, Chengdu, China.
| | - Tinghui Zheng
- Department of Applied Mechanics, Sichuan University, Chengdu 610065, China; Med-X Center for Informatics, Sichuan University, Chengdu 610041, China.
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14
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Hyodo R, Takehara Y, Naganawa S. 4D Flow MRI in the portal venous system: imaging and analysis methods, and clinical applications. Radiol Med 2022; 127:1181-1198. [PMID: 36123520 PMCID: PMC9587937 DOI: 10.1007/s11547-022-01553-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 08/29/2022] [Indexed: 02/07/2023]
Abstract
Thus far, ultrasound, CT, and 2D cine phase-contrast MRI has been adopted to evaluate blood flow and vascular morphology in the portal venous system; however, all these techniques have some shortcomings, such as limited field of view and difficulty in accurately evaluating blood flow. A new imaging technique, namely 3D cine phase-contrast (4D Flow) MRI, can acquire blood flow data of the entire abdomen at once and in a time-resolved manner, allowing visual, quantitative, and comprehensive assessment of blood flow in the portal venous system. In addition, a retrospective blood flow analysis, i.e., "retrospective flowmetry," is possible. Although the development of 4D Flow MRI for the portal system has been delayed compared to that for the arterial system owing to the lower flow velocity of the portal venous system and the presence of respiratory artifacts, several useful reports have recently been published as the technology has advanced. In the first part of this narrative review article, technical considerations of image acquisition and analysis methods of 4D Flow MRI for the portal venous system and the validations of their results are described. In the second part, the current clinical application of 4D Flow MRI for the portal venous system is reviewed.
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Affiliation(s)
- Ryota Hyodo
- Department of Radiology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan.
| | - Yasuo Takehara
- Department of Radiology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
- Department of Fundamental Development for Advanced Low Invasive Diagnostic Imaging, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Shinji Naganawa
- Department of Radiology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
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15
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Oechtering TH, Roberts GS, Panagiotopoulos N, Wieben O, Roldán-Alzate A, Reeder SB. Abdominal applications of quantitative 4D flow MRI. Abdom Radiol (NY) 2022; 47:3229-3250. [PMID: 34837521 PMCID: PMC9135957 DOI: 10.1007/s00261-021-03352-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 11/11/2021] [Accepted: 11/12/2021] [Indexed: 01/18/2023]
Abstract
4D flow MRI is a quantitative MRI technique that allows the comprehensive assessment of time-resolved hemodynamics and vascular anatomy over a 3-dimensional imaging volume. It effectively combines several advantages of invasive and non-invasive imaging modalities like ultrasound, angiography, and computed tomography in a single MRI acquisition and provides an unprecedented characterization of velocity fields acquired non-invasively in vivo. Functional and morphological imaging of the abdominal vasculature is especially challenging due to its complex and variable anatomy with a wide range of vessel calibers and flow velocities and the need for large volumetric coverage. Despite these challenges, 4D flow MRI is a promising diagnostic and prognostic tool as many pathologies in the abdomen are associated with changes of either hemodynamics or morphology of arteries, veins, or the portal venous system. In this review article, we will discuss technical aspects of the implementation of abdominal 4D flow MRI ranging from patient preparation and acquisition protocol over post-processing and quality control to final data analysis. In recent years, the range of applications for 4D flow in the abdomen has increased profoundly. Therefore, we will review potential clinical applications and address their clinical importance, relevant quantitative and qualitative parameters, and unmet challenges.
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Affiliation(s)
- Thekla H. Oechtering
- University of Wisconsin, Department of Radiology, Madison, WI, United States,Universität zu Lübeck, Department of Radiology, Luebeck, Germany
| | - Grant S. Roberts
- University of Wisconsin, Department of Medical Physics, Madison, WI, United States
| | - Nikolaos Panagiotopoulos
- University of Wisconsin, Department of Radiology, Madison, WI, United States,Universität zu Lübeck, Department of Radiology, Luebeck, Germany
| | - Oliver Wieben
- University of Wisconsin, Department of Radiology, Madison, WI, United States,University of Wisconsin, Department of Medical Physics, Madison, WI, United States
| | - Alejandro Roldán-Alzate
- University of Wisconsin, Department of Radiology, Madison, WI, United States,University of Wisconsin, Department of Mechanical Engineering, Madison, WI, United States,University of Wisconsin, Department of Biomedical Engineering, Madison, WI, United States
| | - Scott B. Reeder
- University of Wisconsin, Department of Radiology, Madison, WI, United States,University of Wisconsin, Department of Medical Physics, Madison, WI, United States,University of Wisconsin, Department of Mechanical Engineering, Madison, WI, United States,University of Wisconsin, Department of Biomedical Engineering, Madison, WI, United States,University of Wisconsin, Department of Emergency Medicine, Madison, WI, United States
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16
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Dimov IP, Tous C, Li N, Barat M, Bomberna T, Debbaut C, Jin N, Moran G, Tang A, Soulez G. Assessment of hepatic arterial hemodynamics with 4D flow MRI: in vitro analysis of motion and spatial resolution related error and in vivo feasibility study in 20 volunteers. Eur Radiol 2022; 32:8639-8648. [PMID: 35731288 DOI: 10.1007/s00330-022-08890-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 04/25/2022] [Accepted: 05/17/2022] [Indexed: 11/30/2022]
Abstract
OBJECTIVES To assess the ability of four-dimensional (4D) flow MRI to measure hepatic arterial hemodynamics by determining the effects of spatial resolution and respiratory motion suppression in vitro and its applicability in vivo with comparison to two-dimensional (2D) phase-contrast MRI. METHODS A dynamic hepatic artery phantom and 20 consecutive volunteers were scanned. The accuracies of Cartesian 4D flow sequences with k-space reordering and navigator gating at four spatial resolutions (0.5- to 1-mm isotropic) and navigator acceptance windows (± 8 to ± 2 mm) and one 2D phase-contrast sequence (0.5-mm in -plane) were assessed in vitro at 3 T. Two sequences centered on gastroduodenal and hepatic artery branches were assessed in vivo for intra - and interobserver agreement and compared to 2D phase-contrast. RESULTS In vitro, higher spatial resolution led to a greater decrease in error than narrower navigator window (30.5 to -4.67% vs -6.64 to -4.67% for flow). In vivo, hepatic and gastroduodenal arteries were more often visualized with the higher resolution sequence (90 vs 71%). Despite similar interobserver agreement (κ = 0.660 and 0.704), the higher resolution sequence had lower variability for area (CV = 20.04 vs 30.67%), flow (CV = 34.92 vs 51.99%), and average velocity (CV = 26.47 vs 44.76%). 4D flow had lower differences between inflow and outflow at the hepatic artery bifurcation (11.03 ± 5.05% and 15.69 ± 6.14%) than 2D phase-contrast (28.77 ± 21.01%). CONCLUSION High-resolution 4D flow can assess hepatic artery anatomy and hemodynamics with improved accuracy, greater vessel visibility, better interobserver reliability, and internal consistency. KEY POINTS • Motion-suppressed Cartesian four-dimensional (4D) flow MRI with higher spatial resolution provides more accurate measurements even when accepted respiratory motion exceeds voxel size. • 4D flow MRI with higher spatial resolution provides substantial interobserver agreement for visualization of hepatic artery branches. • Lower peak and average velocities and a trend toward better internal consistency were observed with 4D flow MRI as compared to 2D phase-contrast.
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Affiliation(s)
- Ivan P Dimov
- Laboratory of Clinical Image Processing (LCTI), Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), 900, rue Saint-Denis, Pavillon R, Montreal, QC, H2X 0A9, Canada
| | - Cyril Tous
- Laboratory of Clinical Image Processing (LCTI), Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), 900, rue Saint-Denis, Pavillon R, Montreal, QC, H2X 0A9, Canada
| | - Ning Li
- Laboratory of Clinical Image Processing (LCTI), Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), 900, rue Saint-Denis, Pavillon R, Montreal, QC, H2X 0A9, Canada
| | - Maxime Barat
- Laboratory of Clinical Image Processing (LCTI), Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), 900, rue Saint-Denis, Pavillon R, Montreal, QC, H2X 0A9, Canada.,Department of Radiology and Nuclear Medicine, Centre Hospitalier de l'Université de Montréal (CHUM), Montreal, QC, Canada
| | - Tim Bomberna
- IBiTech-Biommeda, Department of Electronics and Information Systems, Ghent University, Ghent, Belgium.,Cancer Research Institute Ghent (CRIG), Ghent University, Ghent, Belgium
| | - Charlotte Debbaut
- IBiTech-Biommeda, Department of Electronics and Information Systems, Ghent University, Ghent, Belgium.,Cancer Research Institute Ghent (CRIG), Ghent University, Ghent, Belgium
| | - Ning Jin
- Cardiovascular MR R&D, Siemens Medical Solutions USA, Inc., Cleveland, OH, USA
| | - Gerald Moran
- Siemens Healthineers Canada, Oakville, ON, Canada
| | - An Tang
- Laboratory of Clinical Image Processing (LCTI), Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), 900, rue Saint-Denis, Pavillon R, Montreal, QC, H2X 0A9, Canada.,Department of Radiology and Nuclear Medicine, Centre Hospitalier de l'Université de Montréal (CHUM), Montreal, QC, Canada.,Department of Radiology, Radiation Oncology and Nuclear Medicine, Faculty of Medecine, Université de Montréal, 2900 Bd Edouard-Montpetit , Montreal, QC, H3T 1J4, Canada
| | - Gilles Soulez
- Laboratory of Clinical Image Processing (LCTI), Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), 900, rue Saint-Denis, Pavillon R, Montreal, QC, H2X 0A9, Canada. .,Department of Radiology and Nuclear Medicine, Centre Hospitalier de l'Université de Montréal (CHUM), Montreal, QC, Canada. .,Department of Radiology, Radiation Oncology and Nuclear Medicine, Faculty of Medecine, Université de Montréal, 2900 Bd Edouard-Montpetit , Montreal, QC, H3T 1J4, Canada.
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17
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Oechtering TH, Roberts GS, Panagiotopoulos N, Wieben O, Reeder SB, Roldán-Alzate A. Clinical Applications of 4D Flow MRI in the Portal Venous System. Magn Reson Med Sci 2022; 21:340-353. [PMID: 35082218 PMCID: PMC9680553 DOI: 10.2463/mrms.rev.2021-0105] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Accepted: 10/13/2021] [Indexed: 09/27/2023] Open
Abstract
Evaluation of the hemodynamics in the portal venous system plays an essential role in many hepatic pathologies. Changes in portal flow and vessel morphology are often indicative of disease.Routinely used imaging modalities, such as CT, ultrasound, invasive angiography, and MRI, often focus on either hemodynamics or anatomical imaging. In contrast, 4D flow MRI facilitiates a more comprehensive understanding of pathophysiological mechanisms by simultaneously and noninvasively acquiring time-resolved flow and anatomical information in a 3D imaging volume.Though promising, 4D flow MRI in the portal venous system is especially challenging due to small vessel calibers, slow flow velocities, and breathing motion. In this review article, we will discuss how to account for these challenges when planning and conducting 4D flow MRI acquisitions in the upper abdomen. We will address patient preparation, sequence acquisition, postprocessing, quality control, and analysis of 4D flow data.In the second part of this article, we will review potential clinical applications of 4D flow MRI in the portal venous system. The most promising area for clinical utilization is the diagnosis and grading of liver cirrhosis and its complications. Relevant parameters acquired by 4D flow MRI include the detection of reduced or reversed flow in the portal venous system, characterization of portosystemic collaterals, and impaired response to a meal challenge. In patients with cirrhosis, 4D flow MRI has the potential to address the major unmet need of noninvasive detection of gastroesophageal varices at high risk for bleeding. This could replace many unnecessary, purely diagnostic, and invasive esophagogastroduodenoscopy procedures, thereby improving patient compliance with follow-up. Moreover, 4D flow MRI offers unique insights and added value for surgical planning and follow-up of multiple hepatic interventions, including transjugular intrahepatic portosystemic shunts, liver transplantation, and hepatic disease in children. Lastly, we will discuss the path to clinical implementation and remaining challenges.
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Affiliation(s)
- Thekla H. Oechtering
- Department of Radiology, University of Wisconsin, Madison, WI, USA
- Department of Radiology, Universität zu Lübeck, Luebeck, Germany
| | - Grant S. Roberts
- Department of Medical Physics, University of Wisconsin, Madison, WI, USA
| | - Nikolaos Panagiotopoulos
- Department of Radiology, University of Wisconsin, Madison, WI, USA
- Department of Radiology, Universität zu Lübeck, Luebeck, Germany
| | - Oliver Wieben
- Department of Radiology, University of Wisconsin, Madison, WI, USA
- Department of Medical Physics, University of Wisconsin, Madison, WI, USA
| | - Scott B. Reeder
- Department of Radiology, University of Wisconsin, Madison, WI, USA
- Department of Medical Physics, University of Wisconsin, Madison, WI, USA
- Department of Mechanical Engineering, University of Wisconsin, Madison, WI, USA
- Department of Biomedical Engineering, University of Wisconsin, Madison, WI, USA
- Department of Emergency, University of Wisconsin Medicine, Madison, WI, USA
| | - Alejandro Roldán-Alzate
- Department of Radiology, University of Wisconsin, Madison, WI, USA
- Department of Mechanical Engineering, University of Wisconsin, Madison, WI, USA
- Department of Biomedical Engineering, University of Wisconsin, Madison, WI, USA
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18
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Corrado PA, Seiter DP, Wieben O. Automatic measurement plane placement for 4D Flow MRI of the great vessels using deep learning. Int J Comput Assist Radiol Surg 2022; 17:199-210. [PMID: 34403045 PMCID: PMC8851604 DOI: 10.1007/s11548-021-02475-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Accepted: 08/03/2021] [Indexed: 01/03/2023]
Abstract
PURPOSE Despite the great potential and flexibility of 4D flow MRI for hemodynamic analysis, a major limitation is the need for time-consuming and user-dependent post-processing. We propose a fast four-step algorithm for rapid, robust, and repeatable flow measurements in the great vessels based on automatic placement of measurement planes and vessel segmentation. METHODS Our algorithm works by (1) subsampling the 3D image into 3D patches, (2) predicting the probability of each patch containing individual vessels and location/orientation of the vessel within the patch via a convolutional neural network, (3) selecting the predicted planes with highest probabilities for each vessel, and (4) shifting the plane centers to the maximum velocity within each plane. The method was trained on 283 scans and evaluated on 40 unseen scans by comparing algorithm-derived processing times, plane locations, and flow measurements to those of two manual observers (graduate students) using t-tests, Pearson correlation, and Bland-Altman analysis. RESULTS The average processing time for the algorithm (18 s) was shorter than observer 1 (362 s; P < 0.001) and observer 2 (317 s; P < 0.001). The distance between planes placed by the algorithm and those placed by manual observers was slightly greater (O1 vs. algorithm: 9.0 mm, O2 vs. algorithm: 10.3 mm) than the distance between planes placed by the two manual observers (8.3 mm). The correlation between flow values for planes placed by the algorithm and those placed by manual observers was slightly lower (O1 vs. algorithm: R = 0.68, O2 vs. algorithm: R = 0.72) than the flow correlation between the two manual observers (R = 0.81). CONCLUSION Our method is a feasible and accurate approach for fast, reproducible, and automated flow measurement and visualization in 4D flow MRI of the great vessels, with similar variability compared to a manual annotator as the variability between two manual observers. This approach could be applied in other anatomical regions.
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Affiliation(s)
- Philip A. Corrado
- Department of Medical Physics, University of Wisconsin-Madison,
Madison, Wisconsin, USA
| | - Daniel P. Seiter
- Department of Medical Physics, University of Wisconsin-Madison,
Madison, Wisconsin, USA
| | - Oliver Wieben
- Departments of Medical Physics and Radiology, University of
Wisconsin-Madison, Madison, Wisconsin, USA
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19
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Hyodo R, Takehara Y, Mizuno T, Ichikawa K, Yokoyama S, Ishizu Y, Naganawa S. Assessing the Complicated Venous Hemodynamics and Therapeutic Outcomes of Budd-Chiari Syndrome with Respiratory-gated 4D Flow MR Imaging During the Expiratory and Inspiratory Phases. Magn Reson Med Sci 2021; 22:1-6. [PMID: 34880192 PMCID: PMC9849410 DOI: 10.2463/mrms.ici.2021-0110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
A man in his 50s with Budd-Chiari syndrome diagnosed with the suprahepatic inferior vena cava (IVC) obstruction on CT was assessed using 4D Flow MRI before and after balloon angioplasty. 4D Flow MRI acquired in two respiratory phases, depicted complex hemodynamic and respiratory variability, and a jet stream at the narrowed channel of the membranous IVC. Post-interventional 4D Flow MRI showed that the IVC blood flow increased with corrected flow directions in the infrarenal IVC.
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Affiliation(s)
- Ryota Hyodo
- Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan,Corresponding author: Department of Radiology, Nagoya University Graduate School of Medicine, 65, Tsurumai-cho, Showa-ku, Nagoya, Aichi 466-8550, Japan. Phone: +81-52-744-2327, Fax: +81-52-744-2335, E-mail:
| | - Yasuo Takehara
- Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan,Department of Fundamental Development for Advanced Low Invasive Diagnostic Imaging, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Takashi Mizuno
- Department of Medical Technology, Nagoya University Hospital, Nagoya, Aichi, Japan
| | - Kazushige Ichikawa
- Department of Medical Technology, Nagoya University Hospital, Nagoya, Aichi, Japan
| | - Shinya Yokoyama
- Department of Gastroenterology and Hepatology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Yoji Ishizu
- Department of Gastroenterology and Hepatology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Shinji Naganawa
- Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
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20
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Chen X, Qiu ZK, Wang GB, Chen XL, Zhang FJ, Gao F. Effect of transjugular intrahepatic portosystemic shunt on transarterial chemoembolization for hepatocellular carcinoma: a systematic review and meta-analysis. DIAGNOSTIC AND INTERVENTIONAL RADIOLOGY (ANKARA, TURKEY) 2021; 27:671-676. [PMID: 34318755 DOI: 10.5152/dir.2021.20358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
PURPOSE Hepatocellular carcinoma (HCC) usually occurs accompanied by portal hypertension. Transcatheter arterial chemoembolization (TACE) is recommended as an effective treatment in HCC. Recent studies had conflicting results regarding the effectiveness and safety of TACE for HCC in patients with transjugular intrahepatic portosystemic shunt (TIPS). This meta-analysis aimed to evaluate the influence of TIPS on the effectiveness and safety of TACE for patients with HCC. METHODS A comprehensive search of studies among PubMed, Web of Science and Cochrane Library was conducted, from the earliest publishing date to January 27th, 2020. Statistical analyses were all performed using the Stata 13.0 software. I2 index statistic was used to assess heterogeneity. RESULTS Six studies with a total of 536 patients with HCC were included in the analysis. The pooled response rate was 51% (95% CI: 25% to 77%) with a significant heterogeneity (I2=93.3%, p < 0.001). The TACE + TIPS group had an inferior response rate than the non-TIPS group, but the difference had no statistical significance (p = 0.171) and heterogeneity was low (I2=0.00%, p = 0.490). Pooled hepatic failure rate was 8.8% (95% CI: 5.2% to 12.4%) with low heterogeneity (I2=0.0%, p = 0.747). But the pooled hepatic failure rate increased to 12.7% (95% CI: 5.7% to 19.7%) with low heterogeneity (I2=11.5%, p = 0.323) if the patients who received TIPS after TACE were excluded. CONCLUSION TIPS does not influence the effectiveness of TACE, but attention should be paid to the risk of hepatic failure.
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Affiliation(s)
- Xi Chen
- Department of Minimally Invasive - Interventional Radiology, Sun Yat-sen University Cancer Center, Guangzhou, China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University State Key Laboratory of Oncology in South China, Guangzhou, China
| | - Zhen-Kang Qiu
- Department of Minimally Invasive - Interventional Radiology, Sun Yat-sen University Cancer Center, Guangzhou, China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University State Key Laboratory of Oncology in South China, Guangzhou, China
| | - Guo-Bao Wang
- Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University State Key Laboratory of Oncology in South China, Guangzhou, China; Department of Endoscopy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Xin-Lin Chen
- Department of Biostatistics and Preventive Medicine, School of Basic Medical Science, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Fu-Jun Zhang
- Department of Minimally Invasive - Interventional Radiology, Sun Yat-sen University Cancer Center, Guangzhou, China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University State Key Laboratory of Oncology in South China, Guangzhou, China
| | - Fei Gao
- Department of Minimally Invasive - Interventional Radiology, Sun Yat-sen University Cancer Center, Guangzhou, China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University State Key Laboratory of Oncology in South China, Guangzhou, China
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21
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Wang L, Wang R, Zhang C, Yue Z, Zhao H, Fan Z, Wu Y, Zhang Y, Liu F, Dong J. Hepatic parenchyma and vascular blood flow changes after TIPS with spectral CT iodine density in HBV-related liver cirrhosis. Sci Rep 2021; 11:10535. [PMID: 34006977 PMCID: PMC8131370 DOI: 10.1038/s41598-021-89764-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 04/29/2021] [Indexed: 12/13/2022] Open
Abstract
To compare changes in spectral CT iodine densities of hepatic parenchyma and vessels before and after transjugular intrahepatic portosystemic shunt (TIPS) in hepatitis B virus (HBV)-related liver cirrhosis. Twenty-five patients with HBV-related liver cirrhosis who received TIPS for gastroesophageal varices bleeding were recruited. Each patient underwent three phases contrast CT before and after TIPS within 4 weeks, with the raw data reconstructed at 1.25-mm-thick slices. Iodine density (in milligrams per milliliter) was measured on iodine-based material decomposition image. Multiple regions of interest (ROIs) in liver parenchyma, aorta and portal vein were selected from three slices of images. Portal vein trunk was set as the central one, and mean liver parenchymal iodine densities from arterial phase (AP), venous phase (VP) and equilibrium phase (EP) were recorded. Quantitative indices of iodine density (ID), including normalized ID in liver parenchyma for arterial phase (NIDLAP), ID of liver parenchyma for venous phase (IDLVP), ID of portal vein in venous phase (IDPVP) and liver arterial iodine density fraction (AIF), were measured and compared before and after TIPS. Based on Child–Pugh stage, 4, 12 and 9 patients were classified as grade A, B, and C, respectively. Liver volume was comparable before and after TIPS (1110.5 ± 287.4 vs. 1092.0 ± 276.3, P = 0.28). After TIPS, ID was decreased in aorta (146.0 ± 34.5 vs. 120.9 ± 30.7, P < 0.01) whereas increased in liver parenchyma at arterial phase, as demonstrated by IDAP (9.3 ± 3.1 vs. 13.4 ± 4.4 mg/mL) and AIF (0.40 ± 0.11 vs. 0.58 ± 0.11, P < 0.01). For venous or equilibrium phase, quantitative indices remained stable (23.1 ± 4.5 vs. 23.0 ± 5.3, 19.8 ± 4.1 vs. 19.4 ± 4.6) mg/mL (Ps > 0.05). For portal vein, ID and NID were increased after TIPS (23.1 ± 11.7 vs. 36.5 ± 13.0, 16.4 ± 8.5 vs. 31.8 ± 12.8) (P < 0.01). No positive correlation between iodine density and preoperative Child–Pugh score was observed. Based on iodine density measurement, spectral CT as a noninvasive imaging modality may assess hepatic parenchyma and vascular blood flow changes before and after TIPS in HBV-related liver cirrhosis. Clinical registration number: ChiCTR- DDC-16009986.
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Affiliation(s)
- Lei Wang
- Department of Interventional Radiology, Beijing Shijitan Hospital, Capital Medical University, No. 10 Tieyi St, Haidian District, Beijing, 100038, China
| | - Rengui Wang
- Department of Radiology, Beijing Shijitan Hospital, Capital Medical University, No. 10 Tieyi St, Haidian District, Beijing, 100038, China
| | - Chunyan Zhang
- Department of Radiology, Beijing Shijitan Hospital, Capital Medical University, No. 10 Tieyi St, Haidian District, Beijing, 100038, China
| | - Zhendong Yue
- Department of Interventional Radiology, Beijing Shijitan Hospital, Capital Medical University, No. 10 Tieyi St, Haidian District, Beijing, 100038, China
| | - Hongwei Zhao
- Department of Interventional Radiology, Beijing Shijitan Hospital, Capital Medical University, No. 10 Tieyi St, Haidian District, Beijing, 100038, China
| | - Zhenhua Fan
- Department of Interventional Radiology, Beijing Shijitan Hospital, Capital Medical University, No. 10 Tieyi St, Haidian District, Beijing, 100038, China
| | - Yifan Wu
- Department of Interventional Radiology, Beijing Shijitan Hospital, Capital Medical University, No. 10 Tieyi St, Haidian District, Beijing, 100038, China
| | - Yu Zhang
- Department of Interventional Radiology, Beijing Shijitan Hospital, Capital Medical University, No. 10 Tieyi St, Haidian District, Beijing, 100038, China
| | - Fuquan Liu
- Department of Interventional Radiology, Beijing Shijitan Hospital, Capital Medical University, No. 10 Tieyi St, Haidian District, Beijing, 100038, China
| | - Jian Dong
- Department of Radiology, Beijing Shijitan Hospital, Capital Medical University, No. 10 Tieyi St, Haidian District, Beijing, 100038, China.
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22
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Brunsing RL, Brown D, Almahoud H, Kono Y, Loomba R, Vodkin I, Sirlin CB, Alley MT, Vasanawala SS, Hsiao A. Quantification of the Hemodynamic Changes of Cirrhosis with Free-Breathing Self-Navigated MRI. J Magn Reson Imaging 2021; 53:1410-1421. [PMID: 33594733 PMCID: PMC9161739 DOI: 10.1002/jmri.27488] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 12/08/2020] [Accepted: 12/10/2020] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Non-invasive assessment of the hemodynamic changes of cirrhosis might help guide management of patients with liver disease but are currently limited. PURPOSE To determine whether free-breathing 4D flow MRI can be used to quantify the hemodynamic effects of cirrhosis and introduce hydraulic circuit indexes of severity. STUDY TYPE Retrospective. POPULATION Forty-seven patients including 26 with cirrhosis. FIELD STRENGTH/SEQUENCE 3 T/free-breathing 4D flow MRI with soft gating and golden-angle view ordering. ASSESSMENT Measurements of the supra-celiac abdominal aorta, supra-renal abdominal aorta (SRA), celiac trunk (CeT), superior mesenteric artery (SMA), splenic artery (SpA), common hepatic artery (CHA), portal vein (PV), and supra-renal inferior vena cava (IVC) were made by two radiologists. Measures of hepatic vascular resistance (hepatic arterial relative resistance [HARR]; portal resistive index [PRI]) were proposed and calculated. STATISTICAL ANALYSIS Bland-Altman, Pearson's correlation, Tukey's multiple comparison, and Cohen's kappa. P < 0.05 was considered significant. RESULTS Forty-four of 47 studies yielded adequate image quality for flow quantification (94%). Arterial structures showed high inter-reader concordance (range; ρ = 0.948-0.987) and the IVC (ρ = 0.972), with moderate concordance in the PV (ρ = 0.866). Conservation of mass analysis showed concordance between large vessels (SRA vs. IVC; ρ = 0.806), small vessels (celiac vs. CHA + SpA; ρ = 0.939), and across capillary beds (CeT + SMA vs. PV; ρ = 0.862). Splanchnic flow was increased in patients with portosystemic shunting (PSS) relative to control patients and patients with cirrhosis without PSS (P < 0.05, difference range 0.11-0.68 liter/m). HARR was elevated and PRI was decreased in patients with PSS (3.55 and 1.49, respectively) compared to both the control (2.11/3.18) and non-PSS (2.11/2.35) cohorts. DATA CONCLUSION 4D flow MRI with self-navigation was technically feasible, showing promise in quantifying the hemodynamic effects of cirrhosis. Proposed quantitative metrics of hepatic vascular resistance correlated with PSS. LEVEL OF EVIDENCE 3 TECHNICAL EFFICACY STAGE: 2.
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Affiliation(s)
- Ryan L Brunsing
- Department of Radiology, Stanford University, Palo Alto, California, USA
| | - Dustin Brown
- Department of Radiology, University of California San Diego, La Jolla, California, USA
| | - Hashem Almahoud
- Department of Radiology, University of California San Diego, La Jolla, California, USA
| | - Yuko Kono
- Department of Radiology, Stanford University, Palo Alto, California, USA
- Division of Gastroenterology, Department of Medicine, University of California San Diego, La Jolla, California, USA
| | - Rohit Loomba
- Division of Gastroenterology, Department of Medicine, University of California San Diego, La Jolla, California, USA
- Division of Epidemiology, Department of Family Medicine and Preventive Medicine, University of California San Diego, La Jolla, California, USA
- NAFLD Research Center, Department of Medicine, University of California San Diego, La Jolla, California, USA
| | - Irene Vodkin
- Division of Gastroenterology, Department of Medicine, University of California San Diego, La Jolla, California, USA
| | - Claude B Sirlin
- Department of Radiology, University of California San Diego, La Jolla, California, USA
| | - Marcus T Alley
- Department of Radiology, Stanford University, Palo Alto, California, USA
| | | | - Albert Hsiao
- Department of Radiology, University of California San Diego, La Jolla, California, USA
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23
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Haarbye SO, Nielsen MB, Hansen AE, Lauridsen CA. Four-Dimensional Flow MRI of Abdominal Veins: A Systematic Review. Diagnostics (Basel) 2021; 11:767. [PMID: 33923366 PMCID: PMC8146887 DOI: 10.3390/diagnostics11050767] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 04/21/2021] [Accepted: 04/21/2021] [Indexed: 11/25/2022] Open
Abstract
The aim of this systematic review is to provide an overview of the use of Four-Dimensional Magnetic Resonance Imaging of vector blood flow (4D Flow MRI) in the abdominal veins. This study was composed according to the PRISMA guidelines 2009. The literature search was conducted in MEDLINE, Cochrane Library, EMBASE, and Web of Science. Quality assessment of the included studies was performed using the QUADAS-2 tool. The initial search yielded 781 studies and 21 studies were included. All studies successfully applied 4D Flow MRI in abdominal veins. Four-Dimensional Flow MRI was capable of discerning between healthy subjects and patients with cirrhosis and/or portal hypertension. The visual quality and inter-observer agreement of 4D Flow MRI were rated as excellent and good to excellent, respectively, and the studies utilized several different MRI data sampling strategies. By applying spiral sampling with compressed sensing to 4D Flow MRI, the blood flow of several abdominal veins could be imaged simultaneously in 18-25 s, without a significant loss of visual quality. Four-Dimensional Flow MRI might be a useful alternative to Doppler sonography for the diagnosis of cirrhosis and portal hypertension. Further clinical studies need to establish consensus regarding MRI sampling strategies in patients and healthy subjects.
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Affiliation(s)
- Simon O. Haarbye
- Department of Diagnostic Radiology, Rigshospitalet, Copenhagen University Hospital, DK-2100 Copenhagen, Denmark; (M.B.N.); (A.E.H.); (C.A.L.)
- Department of Technology, Faculty of Health and Technology, Metropolitan University College, DK-2100 Copenhagen, Denmark
| | - Michael B. Nielsen
- Department of Diagnostic Radiology, Rigshospitalet, Copenhagen University Hospital, DK-2100 Copenhagen, Denmark; (M.B.N.); (A.E.H.); (C.A.L.)
- Department of Clinical Medicine, University of Copenhagen, DK-1165 Copenhagen, Denmark
| | - Adam E. Hansen
- Department of Diagnostic Radiology, Rigshospitalet, Copenhagen University Hospital, DK-2100 Copenhagen, Denmark; (M.B.N.); (A.E.H.); (C.A.L.)
- Department of Clinical Medicine, University of Copenhagen, DK-1165 Copenhagen, Denmark
| | - Carsten A. Lauridsen
- Department of Diagnostic Radiology, Rigshospitalet, Copenhagen University Hospital, DK-2100 Copenhagen, Denmark; (M.B.N.); (A.E.H.); (C.A.L.)
- Department of Technology, Faculty of Health and Technology, Metropolitan University College, DK-2100 Copenhagen, Denmark
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24
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Hyodo R, Takehara Y, Mizuno T, Ichikawa K, Ishizu Y, Sugiyama M, Naganawa S. Time-resolved 3D cine phase-contrast magnetic resonance imaging (4D-flow MRI) can quantitatively assess portosystemic shunt severity and confirm normalization of portal flow after embolization of large portosystemic shunts. Hepatol Res 2021; 51:343-349. [PMID: 33434371 DOI: 10.1111/hepr.13616] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 12/20/2020] [Accepted: 12/27/2020] [Indexed: 12/13/2022]
Abstract
Diagnosis and severity assessments of portosystemic shunts (PSSs) are important because the pathology sometimes results in severe hepatic encephalopathy, which can be treated almost completely by shunt embolization. At present, morphological assessment of PSS is performed mainly by computed tomography, and ultrasound is used for blood flow assessment. In two cases of PSS-related hepatic encephalopathy, we used time-resolved 3D cine phase-contrast (4D-flow) magnetic resonance imaging (MRI) to assess blood flow before and after shunt embolization. Before the intervention, blood flow in the main trunk of the superior mesenteric vein was mostly hepatofugal. However, post-interventional 4D-flow MRI revealed hepatopetal superior mesenteric vein flow with significantly increased portal vein blood flow. 4D-flow MRI is an ideal adjunct to Doppler ultrasonography, allowing for objective and visual assessment of morphology and blood flow of the portal venous system, including PSSs, and is useful in determining the indications for, and outcome of, PSS embolization.
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Affiliation(s)
- Ryota Hyodo
- Department of Radiology, Nagoya University Graduate School of Medicine, Showa-ku, Nagoya, Japan
| | - Yasuo Takehara
- Department of Radiology, Nagoya University Graduate School of Medicine, Showa-ku, Nagoya, Japan.,Department of Fundamental Development for Advanced Low Invasive Diagnostic Imaging, Nagoya University Graduate School of Medicine, Showa-ku, Nagoya, Japan
| | - Takashi Mizuno
- Department of Medical Radiological Technology, Nagoya University Hospital, Showa-ku, Nagoya, Japan
| | - Kazushige Ichikawa
- Department of Medical Radiological Technology, Nagoya University Hospital, Showa-ku, Nagoya, Japan
| | - Yoji Ishizu
- Department of Gastroenterology and Hepatology, Nagoya University Graduate School of Medicine, Showa-ku, Nagoya, Japan
| | - Masataka Sugiyama
- Department of Radiology, Nagoya University Graduate School of Medicine, Showa-ku, Nagoya, Japan.,Department of Fundamental Development for Advanced Low Invasive Diagnostic Imaging, Nagoya University Graduate School of Medicine, Showa-ku, Nagoya, Japan
| | - Shinji Naganawa
- Department of Radiology, Nagoya University Graduate School of Medicine, Showa-ku, Nagoya, Japan
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25
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Kageyama K, Yamamoto A, Jogo A, Izuta S, Himoto D, Kakimi A, Sohgawa E, Miki Y. Visualization of flow dynamics in the portal circulation using 320-detector-row computed tomography: a feasibility study. Eur Radiol Exp 2021; 5:1. [PMID: 33432529 PMCID: PMC7801554 DOI: 10.1186/s41747-020-00197-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Accepted: 11/26/2020] [Indexed: 11/21/2022] Open
Abstract
Multidetector row computed tomography (CT) scanners perform dynamic scanning and have a wide scan range. Time-resolved three-dimensional CT (i.e., 4D CT) has recently enabled visualization of flow in neurovascular vessels. We hypothesized that 4D CT technology would be a useful and non-invasive method for visualizing the flow dynamics of the portal circulation. The aim of this study was to evaluate the technical feasibility of 4D CT for visualizing flow dynamics in the portal circulation using 320-detector-row CT. 4D CT images of 18 consecutive patients with portal circulation including gastrorenal shunt were retrospectively evaluated for their ability to generate flow dynamics of the portal circulation. Flow dynamics could be visualized by 4D CT in 68 of the 72 vessels in the portal vein, splenic vein, superior mesenteric vein, and gastrorenal shunt. Flow direction could not be identified in four vessels, all of them being superior mesenteric veins. Flow direction was recognized on 4D CT in the 68 vessels of the portal circulation. A preliminary validation study revealed that flow direction of all 19 vessels in the portal circulation had concordance between 4D CT and color Doppler ultrasound. 4D CT could visualize flow dynamics of the portal circulation.
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Affiliation(s)
- Ken Kageyama
- Department of Diagnostic and Interventional Radiology, Graduate School of Medicine, Osaka City University, 1-4-3 Asahi-machi, Abeno-ku, Osaka, 545-8585, Japan.
| | - Akira Yamamoto
- Department of Diagnostic and Interventional Radiology, Graduate School of Medicine, Osaka City University, 1-4-3 Asahi-machi, Abeno-ku, Osaka, 545-8585, Japan
| | - Atsushi Jogo
- Department of Diagnostic and Interventional Radiology, Graduate School of Medicine, Osaka City University, 1-4-3 Asahi-machi, Abeno-ku, Osaka, 545-8585, Japan
| | - Shinichiro Izuta
- Department of Central Radiology, Osaka City University Hospital, 1-5-7 Asahi-machi, Abeno-ku, Osaka, 545-8586, Japan
| | - Daisuke Himoto
- Department of Central Radiology, Osaka City University Hospital, 1-5-7 Asahi-machi, Abeno-ku, Osaka, 545-8586, Japan
| | - Akihiko Kakimi
- Department of Central Radiology, Osaka City University Hospital, 1-5-7 Asahi-machi, Abeno-ku, Osaka, 545-8586, Japan
| | - Etsuji Sohgawa
- Department of Diagnostic and Interventional Radiology, Graduate School of Medicine, Osaka City University, 1-4-3 Asahi-machi, Abeno-ku, Osaka, 545-8585, Japan
| | - Yukio Miki
- Department of Diagnostic and Interventional Radiology, Graduate School of Medicine, Osaka City University, 1-4-3 Asahi-machi, Abeno-ku, Osaka, 545-8585, Japan
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Riedel C, Lenz A, Fischer L, Li J, Piecha F, Kluwe J, Adam G, Bannas P. Abdominal Applications of 4D Flow MRI. ROFO-FORTSCHR RONTG 2020; 193:388-398. [PMID: 33264806 DOI: 10.1055/a-1271-7405] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND Four-dimensional flow magnetic resonance imaging (4D flow MRI) provides volumetric and time-resolved visualization and quantification of blood flow. This review presents an overview of possible applications of 4D flow MRI for non-invasive assessment of abdominal hemodynamics. METHOD This review is based on the authors' experience and the current literature. A PubMed database literature research was performed in December 2019 focusing on abdominal applications of 4D flow MRI. We illustrated the review with exemplary figures and movies of clinical cases from our institution. RESULTS AND CONCLUSION 4D flow MRI offers the possibility of comprehensive assessment of abdominal blood flows in different vascular territories and organ systems. Results of recent studies indicate that 4D flow MRI improves understanding of altered hemodynamics in patients with abdominal disease and may be useful for monitoring therapeutic response. Future studies with larger cohorts aiming to integrate 4D flow MRI in the clinical routine setting are needed. KEY POINTS · 4D flow MRI enables comprehensive visualization of the complex abdominal vasculature. · 4D flow MRI enables quantification of abdominal blood flow velocities and flow rates. · 4D flow MRI may enable deeper understanding of altered hemodynamics in abdominal disease. · Further validation studies are needed prior to broad distribution of abdominal 4D flow MRI. CITATION FORMAT · Riedel C, Lenz A, Fischer L et al. Abdominal Applications of 4D Flow MRI. Fortschr Röntgenstr 2021; 193: 388 - 398.
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Affiliation(s)
- Christoph Riedel
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Alexander Lenz
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Lutz Fischer
- Department of Visceral Transplantation, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Jun Li
- Department of Visceral Transplantation, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Department of General, Visceral and Thoracic Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Feilix Piecha
- I. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Johannes Kluwe
- I. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Gerhard Adam
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Peter Bannas
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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Kennedy P, Bane O, Hectors SJ, Fischman A, Schiano T, Lewis S, Taouli B. Noninvasive imaging assessment of portal hypertension. Abdom Radiol (NY) 2020; 45:3473-3495. [PMID: 32926209 PMCID: PMC10124623 DOI: 10.1007/s00261-020-02729-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 08/16/2020] [Accepted: 08/30/2020] [Indexed: 02/07/2023]
Abstract
Portal hypertension (PH) is a spectrum of complications of chronic liver disease (CLD) and cirrhosis, with manifestations including ascites, gastroesophageal varices, splenomegaly, hypersplenism, hepatic hydrothorax, hepatorenal syndrome, hepatopulmonary syndrome and portopulmonary hypertension. PH can vary in severity and is diagnosed via invasive hepatic venous pressure gradient measurement (HVPG), which is considered the reference standard. Accurate diagnosis of PH and assessment of severity are highly relevant as patients with clinically significant portal hypertension (CSPH) are at higher risk for developing acute variceal bleeding and mortality. In this review, we discuss current and upcoming noninvasive imaging methods for diagnosis and assessment of severity of PH.
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Hyodo R, Takehara Y, Mizuno T, Ichikawa K, Ogura Y, Naganawa S. Portal Vein Stenosis Following Liver Transplantation Hemodynamically Assessed with 4D-flow MRI before and after Portal Vein Stenting. Magn Reson Med Sci 2020; 20:231-235. [PMID: 32788504 PMCID: PMC8424031 DOI: 10.2463/mrms.ici.2020-0057] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
We present a case of a patient who underwent portal vein (PV) stenting for PV stenosis after a living-donor liver transplantation. A pretreatment 3D cine phase-contrast (4D-flow) MRI showed decreased, though hepatopetal, blood flow in the PV. After stenting, 4D-flow MRI confirmed an improvement in PV flow, with a more homogeneous flow distribution to each hepatic segment. 4D-flow MRI are valuable for understanding the hemodynamics of this area, planning for treatments, and evaluating the outcome of the interventions.
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Affiliation(s)
- Ryota Hyodo
- Department of Radiology, Nagoya University Graduate School of Medicine
| | - Yasuo Takehara
- Department of Radiology, Nagoya University Graduate School of Medicine
| | - Takashi Mizuno
- Department of Medical Technology, Nagoya University Hospital
| | | | - Yasuhiro Ogura
- Department of Transplantation Surgery, Nagoya University Hospital
| | - Shinji Naganawa
- Department of Radiology, Nagoya University Graduate School of Medicine
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Noninvasive evaluation of esophageal varices in cirrhotic patients based on spleen hemodynamics: a dual-energy CT study. Eur Radiol 2020; 30:3210-3216. [PMID: 32072256 DOI: 10.1007/s00330-020-06680-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 12/17/2019] [Accepted: 01/28/2020] [Indexed: 12/18/2022]
Abstract
OBJECTIVE To evaluate noninvasively the severity of esophageal varices (EV) in cirrhotic patients using splenic hemodynamics obtained with dual-energy CT. METHODS We retrospectively analyzed 72 cirrhotic patients with EV between December 2018 and June 2019. Patients were divided into three groups: mild (EV1), medium (EV2), or severe (EV3) EV groups based on severity of EV assessed by endoscopy. An additional control group included 20 patients with normal liver CT. All patients underwent contrast-enhanced dual-energy CT. The iodine weight in spleen (IW-S) was calculated as IW-S = IC-S (iodine concentration in spleen) × V-S (spleen volume). Differences between EV and control groups were analyzed using one-way analysis of variance with Welch's correction. Games-Howell test made further pairwise comparison. The diagnostic value of IW-S on high-risk EV (EV2, EV3, or EV1 with red color sign) was evaluated using the ROC curve. p < 0.05 indicated statistical significance. RESULTS The overall difference of IW-S between the control and EV groups was statistically significant (p < 0.001). Patients with more severe EV had higher IW-S values. Pairwise comparisons showed that except for control vs. EV1 groups, the IW-S between any other two groups was significantly different (p < 0.05). With a cutoff value at 1087 mg, the AUC for using IW-S for the detection of high-risk EV was 0.87 (95% CI 0.77~0.94). Sensitivity and specificity were 84.9% and 84.2%, respectively. CONCLUSION IW-S obtained with dual-energy CT can noninvasively predict EV severity. KEY POINTS • A higher iodine weight in spleen (IW-S) was observed in case of severe esophageal varices. • Cirrhotic patients have significantly higher IW-S than normal-liver patients. • IW-S in dual-energy CT maybe used to evaluate the severity of EV.
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Ren XJ. CT and MRI assessment of intestinal blood flow. Shijie Huaren Xiaohua Zazhi 2019; 27:851-856. [DOI: 10.11569/wcjd.v27.i14.851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The accuracy of multi-slice computed tomography (CT) in the diagnosis of acute mesenteric ischemia is very high, however, it cannot demonstrate the small embolus of blood vessels and abnormal intestinal blood flow. The intestinal blood flow in chronic mesenteric ischemia decreases whereas there are few morphology changes, which leads to a high misdiagnosis rate of CT and CT angiography. In addition, inflammatory bowel disease, intestinal tumors, and portal hypertension can be diagnosed definitely by conventional CT, but the hemodynamics and microcirculation in these conditions cannot be assessed, which affects the accuracy of clinical staging and the assessment of therapeutic effect. For intestinal diseases, especially mesenteric ischemia, therefore, it is needed not only to make CT morphologic diagnosis but also to further assess the abnormal intestinal blood flow. In recent years, more and more CT and magnetic resonance imaging (MRI)-related new techniques for assessing blood flow have emerged, including CT perfusion, spectral CT imaging, magnetic resonance perfusion imaging, and phase contrast MRI. This paper reviews the clinical application and progress of these techniques for assessing intestinal blood flow.
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Affiliation(s)
- Xiao-Jun Ren
- Department of Radiology, Xidian Group Hospital Affiliated Shaanxi University of Chinese Medicine, Xi'an 710077, Shaanxi Province, China
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Luo SH, Chu JG, Huang H, Yao KC. Safety and efficacy of transjugular intrahepatic portosystemic shunt combined with palliative treatment in patients with hepatocellular carcinoma. World J Clin Cases 2019; 7:1599-1610. [PMID: 31367619 PMCID: PMC6658383 DOI: 10.12998/wjcc.v7.i13.1599] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 04/10/2019] [Accepted: 05/01/2019] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND There is a close relationship between cirrhosis and hepatocellular carcinoma (HCC). Transjugular intrahepatic portosystemic shunt (TIPS) has good clinical effect in treating the complication of portal hypertension. However, because of the risk of postoperative liver failure, severe complications, and low survival rate for HCC, TIPS is contraindicated in patients with portal hypertension and liver cancer. We studied a large cohort of patients with cirrhosis and HCC who underwent TIPS for recurrent variceal bleeding and/or ascites.
AIM To assess the safety, efficacy, and survival rate in patients with HCC who underwent TIPS.
METHODS Group A comprised 217 patients with HCC and portal hypertension who underwent the TIPS procedure between 1999 and 2014. After TIPS deployment, these patients received palliative treatment for HCC. Group B comprised a cohort of 136 HCC patients with portal hypertension who did not undergo TIPS placement. Group B received palliative treatment for HCC plus medical therapy for portal hypertension. The clinical outcomes and survival rate were assessed.
RESULTS In Group A, the primary technical success rate was 97.69% for TIPS placement, and no severe procedure-related complications of TIPS placement were reported. The control of variceal bleeding (VB) within 1 mo did not differ significantly between the groups (P = 0.261). Absorption of refractory ascites within 1 mo, recurrence of VB, and recurrence of refractory ascites differed significantly between the groups (P = 0.017, 0.023, and 0.009, respectively). By comparison, the rate of hepatic encephalopathy in Group B was lower than that in Group A (P = 0.036). The 1-, 2-, 3-, 4-, and 5-year survival rates were significantly different between Groups A and B (χ2 = 12.227, P = 0.018; χ2 = 12.457, P = 0.014; χ2 = 26.490, P = 0.013; χ2 = 21.956, P = 0.009, and χ2 = 24.596, P = 0.006, respectively). The mean survival time was 43.7 mo in Group A and 31.8 mo in Group B. Median survival time was 50.0 mo in Group A and 33.0 mo in Group B. Mean and median survival differed significantly between the two groups (P = 0.000, χ2 = 35.605, log-rank test). The mortality rate from VB in Group A was low than that in Group B (P = 0.006), but the rates of hepatic tumor, hepatic failure, and multiorgan failure did not differ significantly between the two groups (P = 0.173, 0.246 and 0.257, respectively).
CONCLUSION TIPS combined with palliative treatment is safe and effective for portal hypertension in patients with HCC.
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Affiliation(s)
- Shi-Hua Luo
- Department of Radiology, Zhongnan Hospital of Wuhan University, Wuhan 430071, Hubei Province, China
| | - Jian-Guo Chu
- Department of Radiology, Air Force Medical Center of PLA, Beijing 100142, China
| | - He Huang
- Department of Radiology, Air Force Medical Center of PLA, Beijing 100142, China
| | - Ke-Chun Yao
- Department of Ultrasound, Air Force Medical Center of PLA, Beijing 100142, China
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Owen JW, Saad NE, Foster G, Fowler KJ. The Feasibility of Using Volumetric Phase-Contrast MR Imaging (4D Flow) to Assess for Transjugular Intrahepatic Portosystemic Shunt Dysfunction. J Vasc Interv Radiol 2018; 29:1717-1724. [PMID: 30396843 DOI: 10.1016/j.jvir.2018.07.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 07/09/2018] [Accepted: 07/23/2018] [Indexed: 02/07/2023] Open
Abstract
PURPOSE To demonstrate the feasibility of detecting patency, stenosis, or occlusion of transjugular intrahepatic portosystemic shunt (TIPS) with four-dimensional (4D) flow MR imaging. MATERIALS AND METHODS Sequential adult patients with TIPS were eligible for enrollment. Volumetric phase-contrast sequence was used to image TIPS. Particle tracing cine images were used for qualitative assessment of stenosis. TIPS was segmented to generate quantitative data sets of peak velocity. Segmentation and quantitative measurement of flow throughout an entire TIPS defined technical success. Doppler US was used for comparison. Venography, when available, and 6-month clinical follow-up were used as reference standards. RESULTS 4D flow MR imaging was performed in 23 patient encounters and was technically successful in 16/23 (69.6%) encounters. Three cases demonstrated both focal turbulence and abnormal velocities (> 190 cm/s or < 90 cm/s) on 4D flow and had venography-confirmed stenosis (true-positive cases). Seven cases had normal velocities and no turbulence on 4D flow, and all were confirmed negative with clinical follow-up or venography (true-negative cases). Six cases had discordant 4D flow results, with abnormal velocities but no turbulence or focal turbulence but normal velocities. All 6 discordant cases had no evidence of dysfunction during 6-month follow-up. CONCLUSION 4D flow MR imaging can detect TIPS patency and stenosis, but further investigation is required before it can be used to assess for TIPS dysfunction.
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Affiliation(s)
- Joseph W Owen
- Department of Radiology, University of Kentucky College of Medicine, 800 Rose Street, HX315A, Lexington, KY 40536-0293.
| | - Nael E Saad
- Department of Imaging Sciences, University of Rochester Medical Center, Rochester, New York
| | - Glenn Foster
- Department of Radiology, Washington University School of Medicine, St. Louis, Missouri
| | - Kathryn J Fowler
- Department of Radiology, Washington University School of Medicine, St. Louis, Missouri
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Motosugi U, Roldán-Alzate A, Bannas P, Said A, Kelly S, Zea R, Wieben O, Reeder SB. Four-dimensional Flow MRI as a Marker for Risk Stratification of Gastroesophageal Varices in Patients with Liver Cirrhosis. Radiology 2018; 290:101-107. [PMID: 30325278 DOI: 10.1148/radiol.2018180230] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Purpose To assess the feasibility of four-dimensional (4D) flow MRI as a noninvasive imaging marker for stratifying the risk of variceal bleeding in patients with liver cirrhosis. Materials and Methods This study recruited participants scheduled for both liver MRI and gastroesophageal endoscopy. Risk of variceal bleeding was assessed at endoscopy by using a three-point scale: no varices, low risk, and high risk requiring treatment. Four-dimensional flow MRI was used to create angiograms for evaluating visibility of varices and to measure flow volumes in main portal vein (PV), superior mesenteric vein, splenic vein (SV), and azygos vein. Fractional flow changes in PV and SV were calculated to quantify shunting (outflow) from PV and SV into varices. Logistic analysis was used to identify the independent indicator of high-risk varices. Results There were 23 participants (mean age, 52.3 years; age range, 25-75 years), including 14 men (mean age, 51.7 years; age range, 25-75 years) and nine women (mean age, 53.2 years; age range, 31-72 years) with no varices (n = 8), low-risk varices (n = 8), and high-risk varices (n = 7) determined at endoscopy. Four-dimensional flow MRI-based angiography helped radiologists to view varices in four of 15 participants with varices. Independent indicators of high-risk varices were flow volume in the azygos vein greater than 0.1 L/min (P = .034; 100% sensitivity [seven of seven] and 62% specificity [10 of 16]) and fractional flow change in PV of less than 0 (P < .001; 100% sensitivity [seven of seven] and 94% specificity [15 of 16]). Conclusion Azygos flow greater than 0.1 L/min and portal venous flow less than the sum of splenic and superior mesenteric vein flow are useful markers to stratify the risk of gastroesophageal varices bleeding in patients with liver cirrhosis. © RSNA, 2018 Online supplemental material is available for this article.
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Affiliation(s)
- Utaroh Motosugi
- From the Department of Radiology (U.M., A.R.A., P.B., O.W., S.B.R.), Department of Mechanical Engineering (A.R.A.), Division of Gastroenterology and Hepatology, Department of Medicine (A.S.), Department of Biostatistics & Medical Informatics (R.Z.), Department of Medical Physics (O.W., S.B.R.), Department of Medicine (S.B.R.), Department of Biomedical Engineering (S.B.R.), and Department of Emergency Medicine (S.B.R.), University of Wisconsin, Madison, Wis; Department of Radiology, University of Yamanashi, 1110 Shimokato, Chuo-shi, Yamanashi 409-3898, Japan (U.M.); Department of Radiology, University Hospital Hamburg-Eppendorf, Hamburg, Germany (P.B.); and Division of Gastroenterology, Hepatology, and Nutrition, The Ohio State University Wexner Medical Center, Columbus, Ohio (S.K.)
| | - Alejandro Roldán-Alzate
- From the Department of Radiology (U.M., A.R.A., P.B., O.W., S.B.R.), Department of Mechanical Engineering (A.R.A.), Division of Gastroenterology and Hepatology, Department of Medicine (A.S.), Department of Biostatistics & Medical Informatics (R.Z.), Department of Medical Physics (O.W., S.B.R.), Department of Medicine (S.B.R.), Department of Biomedical Engineering (S.B.R.), and Department of Emergency Medicine (S.B.R.), University of Wisconsin, Madison, Wis; Department of Radiology, University of Yamanashi, 1110 Shimokato, Chuo-shi, Yamanashi 409-3898, Japan (U.M.); Department of Radiology, University Hospital Hamburg-Eppendorf, Hamburg, Germany (P.B.); and Division of Gastroenterology, Hepatology, and Nutrition, The Ohio State University Wexner Medical Center, Columbus, Ohio (S.K.)
| | - Peter Bannas
- From the Department of Radiology (U.M., A.R.A., P.B., O.W., S.B.R.), Department of Mechanical Engineering (A.R.A.), Division of Gastroenterology and Hepatology, Department of Medicine (A.S.), Department of Biostatistics & Medical Informatics (R.Z.), Department of Medical Physics (O.W., S.B.R.), Department of Medicine (S.B.R.), Department of Biomedical Engineering (S.B.R.), and Department of Emergency Medicine (S.B.R.), University of Wisconsin, Madison, Wis; Department of Radiology, University of Yamanashi, 1110 Shimokato, Chuo-shi, Yamanashi 409-3898, Japan (U.M.); Department of Radiology, University Hospital Hamburg-Eppendorf, Hamburg, Germany (P.B.); and Division of Gastroenterology, Hepatology, and Nutrition, The Ohio State University Wexner Medical Center, Columbus, Ohio (S.K.)
| | - Adnan Said
- From the Department of Radiology (U.M., A.R.A., P.B., O.W., S.B.R.), Department of Mechanical Engineering (A.R.A.), Division of Gastroenterology and Hepatology, Department of Medicine (A.S.), Department of Biostatistics & Medical Informatics (R.Z.), Department of Medical Physics (O.W., S.B.R.), Department of Medicine (S.B.R.), Department of Biomedical Engineering (S.B.R.), and Department of Emergency Medicine (S.B.R.), University of Wisconsin, Madison, Wis; Department of Radiology, University of Yamanashi, 1110 Shimokato, Chuo-shi, Yamanashi 409-3898, Japan (U.M.); Department of Radiology, University Hospital Hamburg-Eppendorf, Hamburg, Germany (P.B.); and Division of Gastroenterology, Hepatology, and Nutrition, The Ohio State University Wexner Medical Center, Columbus, Ohio (S.K.)
| | - Sean Kelly
- From the Department of Radiology (U.M., A.R.A., P.B., O.W., S.B.R.), Department of Mechanical Engineering (A.R.A.), Division of Gastroenterology and Hepatology, Department of Medicine (A.S.), Department of Biostatistics & Medical Informatics (R.Z.), Department of Medical Physics (O.W., S.B.R.), Department of Medicine (S.B.R.), Department of Biomedical Engineering (S.B.R.), and Department of Emergency Medicine (S.B.R.), University of Wisconsin, Madison, Wis; Department of Radiology, University of Yamanashi, 1110 Shimokato, Chuo-shi, Yamanashi 409-3898, Japan (U.M.); Department of Radiology, University Hospital Hamburg-Eppendorf, Hamburg, Germany (P.B.); and Division of Gastroenterology, Hepatology, and Nutrition, The Ohio State University Wexner Medical Center, Columbus, Ohio (S.K.)
| | - Ryan Zea
- From the Department of Radiology (U.M., A.R.A., P.B., O.W., S.B.R.), Department of Mechanical Engineering (A.R.A.), Division of Gastroenterology and Hepatology, Department of Medicine (A.S.), Department of Biostatistics & Medical Informatics (R.Z.), Department of Medical Physics (O.W., S.B.R.), Department of Medicine (S.B.R.), Department of Biomedical Engineering (S.B.R.), and Department of Emergency Medicine (S.B.R.), University of Wisconsin, Madison, Wis; Department of Radiology, University of Yamanashi, 1110 Shimokato, Chuo-shi, Yamanashi 409-3898, Japan (U.M.); Department of Radiology, University Hospital Hamburg-Eppendorf, Hamburg, Germany (P.B.); and Division of Gastroenterology, Hepatology, and Nutrition, The Ohio State University Wexner Medical Center, Columbus, Ohio (S.K.)
| | - Oliver Wieben
- From the Department of Radiology (U.M., A.R.A., P.B., O.W., S.B.R.), Department of Mechanical Engineering (A.R.A.), Division of Gastroenterology and Hepatology, Department of Medicine (A.S.), Department of Biostatistics & Medical Informatics (R.Z.), Department of Medical Physics (O.W., S.B.R.), Department of Medicine (S.B.R.), Department of Biomedical Engineering (S.B.R.), and Department of Emergency Medicine (S.B.R.), University of Wisconsin, Madison, Wis; Department of Radiology, University of Yamanashi, 1110 Shimokato, Chuo-shi, Yamanashi 409-3898, Japan (U.M.); Department of Radiology, University Hospital Hamburg-Eppendorf, Hamburg, Germany (P.B.); and Division of Gastroenterology, Hepatology, and Nutrition, The Ohio State University Wexner Medical Center, Columbus, Ohio (S.K.)
| | - Scott B Reeder
- From the Department of Radiology (U.M., A.R.A., P.B., O.W., S.B.R.), Department of Mechanical Engineering (A.R.A.), Division of Gastroenterology and Hepatology, Department of Medicine (A.S.), Department of Biostatistics & Medical Informatics (R.Z.), Department of Medical Physics (O.W., S.B.R.), Department of Medicine (S.B.R.), Department of Biomedical Engineering (S.B.R.), and Department of Emergency Medicine (S.B.R.), University of Wisconsin, Madison, Wis; Department of Radiology, University of Yamanashi, 1110 Shimokato, Chuo-shi, Yamanashi 409-3898, Japan (U.M.); Department of Radiology, University Hospital Hamburg-Eppendorf, Hamburg, Germany (P.B.); and Division of Gastroenterology, Hepatology, and Nutrition, The Ohio State University Wexner Medical Center, Columbus, Ohio (S.K.)
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Bane O, Peti S, Wagner M, Hectors S, Dyvorne H, Markl M, Taouli B. Hemodynamic measurements with an abdominal 4D flow MRI sequence with spiral sampling and compressed sensing in patients with chronic liver disease. J Magn Reson Imaging 2018; 49:994-1005. [PMID: 30318674 DOI: 10.1002/jmri.26305] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 07/30/2018] [Accepted: 07/31/2018] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND The test-retest/interobserver repeatability and diagnostic value of 4D flow MRI in liver disease is underreported. PURPOSE To determine the reproducibility/repeatability of flow quantification in abdominal vessels using a spiral 4D flow MRI sequence; to assess the value of 4D flow parameters in diagnosing cirrhosis and degree of portal hypertension. STUDY TYPE Prospective. SUBJECTS Fifty-two patients with chronic liver disease. FIELD STRENGTH/SEQUENCE 1.5T/spiral 4D flow acquired in one breath-hold. ASSESSMENT Thirteen abdominal vessels were identified and segmented by two independent observers to measure maximum and time-averaged through-plane velocity, net flow, and vessel cross-section area. Interobserver agreement and test-retest repeatability were evaluated in 15 and 4 cases, respectively. Prediction of the presence and severity of cirrhosis and portal hypertension was assessed using 4D flow parameters. STATISTICAL TESTS Cohen's kappa coefficient, coefficient of variation (CV), Bland-Altman, Mann-Whitney tests, logistic regression. RESULTS For all vessels combined, measurements showed acceptable agreement between observers, with Cohen's kappa = 0.70 (P < 0.001), CV < 21%, Bland-Altman bias <5%, but high limits of agreement ([-75%,75%]). Test-retest repeatability was excellent in large vessels (CV = 1-15%, bias = 1-25%, Bland-Altman limits of agreement [BALA] = [4%,150%]), and poor in small vessels (CV = 7-130%, bias = 10-200%, BALA = [8%,190%]). Average velocity in the right hepatic vein and average area of the splenic vein were higher in cirrhosis (P = 0.027/0.0039). Flow in the middle hepatic vein strongly correlated with Child-Pugh score (ρ = 0.84, P = 0.0238), while flow in the splenic vein (ρ = 0.43, P = 0.032), time-average (ρ = 0.46, P = 0.02) and peak velocity in the superior mesenteric vein (ρ = 0.45, P = 0.032), and peak velocity in the infrarenal IVC (ρ = 0.39, P = 0.032) positively correlated with an imaging-based portal hypertension score. Average area of the splenic vein predicted cirrhosis (P = 0.019; area under the curve AUC [95% confidence interval, CI] = 0.87 [0.71,1.00]) and clinically significant portal hypertension (P = 0.042; AUC [95% CI] = 0.78 [0.57-0.99]). DATA CONCLUSION Spiral 4D flow allows comprehensive assessment of abdominal vessels in one breath-hold, with substantial interobserver reproducibility, but variable test-retest repeatability. 4D flow may potentially reflect vascular changes due to cirrhosis and portal hypertension. LEVEL OF EVIDENCE 2 Technical Efficacy: Stage 2 J. Magn. Reson. Imaging 2019;49:994-1005.
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Affiliation(s)
- Octavia Bane
- Department of Radiology, Icahn School of Medicine at Mount Sinai, New York, New York, USA.,Translational and Molecular Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Steven Peti
- Department of Radiology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Mathilde Wagner
- Translational and Molecular Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA.,Department of Radiology, Groupe Hospitalier Pitié Salpêtrière, Paris, France
| | - Stefanie Hectors
- Department of Radiology, Icahn School of Medicine at Mount Sinai, New York, New York, USA.,Translational and Molecular Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Hadrien Dyvorne
- Translational and Molecular Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA.,Catalyzer, Guilford, Connecticut, USA
| | - Michael Markl
- Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA.,Department of Biomedical Engineering, Northwestern University, Evanston, Illinois, USA
| | - Bachir Taouli
- Department of Radiology, Icahn School of Medicine at Mount Sinai, New York, New York, USA.,Translational and Molecular Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
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Maschke SK, Werncke T, Renne J, Kloeckner R, Marquardt S, Kirstein MM, Potthoff A, Wacker FK, Meyer BC, Hinrichs JB. Transjugular intrahepatic portosystemic shunt (TIPS) dysfunction: quantitative assessment of flow and perfusion changes using 2D-perfusion angiography following shunt revision. Abdom Radiol (NY) 2018; 43:2868-2875. [PMID: 29500653 DOI: 10.1007/s00261-018-1547-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
PURPOSE To analyze the feasibility of 2D-perfusion angiography (2D-PA) to quantify flow and perfusion changes pre- and post-transjugular intrahepatic portosystemic shunt (TIPS) revision. MATERIALS AND METHODS Fifteen consecutive patients (54 ± 14 years, seven men and eight women) scheduled for TIPS revision were included in this study. To quantify flow and perfusion changes caused by TIPS revision, digital subtraction angiography (DSA) series acquired during the revision were post-processed using a dedicated software. Reference region-of-interest (ROI) in the main portal vein (input function) and target ROIs in the TIPS lumen, the liver parenchyma and in the right atrium were placed in corresponding areas on DSA pre- and post-TIPS revision. 2D-PA evaluation included time to peak (TTP), peak density (PD), and the area under the curve (AUC) assessment. The ratios of reference ROI to target ROIs pre- and post-TIPS revision were calculated (TTPparenchyma/TTPinflow, PDparenchyma/PDinflow, AUCparenchyma/AUCinflow, TTPTIPS/TTPinflow, PDTIPS/PDinflow, AUCTIPS/AUCinflow, TTPatrium/TTPinflow, PDatrium/PDinflow, and AUCatrium/AUCinflow). Pressure measurements pre- and post-TIPS revision were performed and correlated to the 2D-PA parameters. Reproducibility of 2D-PA was assessed by the intra-class correlation coefficient (ICC). RESULTS The portosystemic pressure gradient was significantly reduced following TIPS revision (17.1 ± 6.3 vs. 8.9 ± 4.3 mmHg; p < 0.0001). PDTIPS/PDinflow (0.22 vs. 0.35; p = 0.0014) and AUCTIPS/AUCinflow (0.24 vs. 0.39; p = 0.0012) increased significantly. Likewise, PDatrium/PDinflow (0.32 vs. 0.78; p = 0.0004) and AUCatrium/AUCinflow (0.3 vs. 0.79; p < 0.0001) increased, whereas PDparenchyma/PDinflow decreased significantly (0.14 vs. 0.1; p = 0.0084). Pressure gradient changes correlated significantly with the increase in PDatrium/PDinflow (r = - 0.77, p = 0.0012) and AUCatrium/AUCinflow (r = - 0.76, p = 0.0018). ICC of the 2D-PA parameters was in the range of 0.88-0.99. CONCLUSION 2D-PA offers a feasible approach to quantify flow and perfusion changes during TIPS revision. Therefore, 2D-PA may be a valuable amendment to mere pressure measurements.
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Affiliation(s)
- Sabine K Maschke
- Department of Diagnostic and Interventional Radiology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
| | - Thomas Werncke
- Department of Diagnostic and Interventional Radiology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
| | - Julius Renne
- Department of Diagnostic and Interventional Radiology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
| | - Roman Kloeckner
- Department of Diagnostic and Interventional Radiology, Johannes Gutenberg-University Medical Centre, Mainz, Germany
| | - Steffen Marquardt
- Department of Diagnostic and Interventional Radiology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
| | - Martha M Kirstein
- Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany
| | - Andrej Potthoff
- Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany
| | - Frank K Wacker
- Department of Diagnostic and Interventional Radiology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
| | - Bernhard C Meyer
- Department of Diagnostic and Interventional Radiology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
| | - Jan B Hinrichs
- Department of Diagnostic and Interventional Radiology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany.
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Frydrychowicz A, Roldan-Alzate A, Winslow E, Consigny D, Campo CA, Motosugi U, Johnson KM, Wieben O, Reeder SB. Comparison of radial 4D Flow-MRI with perivascular ultrasound to quantify blood flow in the abdomen and introduction of a porcine model of pre-hepatic portal hypertension. Eur Radiol 2017; 27:5316-5324. [PMID: 28656461 DOI: 10.1007/s00330-017-4862-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Revised: 03/22/2017] [Accepted: 04/20/2017] [Indexed: 02/07/2023]
Abstract
OBJECTIVES Objectives of this study were to compare radial time-resolved phase contrast magnetic resonance imaging (4D Flow-MRI) with perivascular ultrasound (pvUS) and to explore a porcine model of acute pre-hepatic portal hypertension (PHTN). METHODS Abdominal 4D Flow-MRI and pvUS in portal and splenic vein, hepatic and both renal arteries were performed in 13 pigs of approximately 60 kg. In six pigs, measurements were repeated after partial portal vein (PV) ligature. Inter- and intra-reader comparisons and statistical analysis including Bland-Altman (BA) comparison, paired Student's t tests and linear regression were performed. RESULTS PvUS and 4D Flow-MRI measurements agreed well; flow before partial PV ligature was 322 ± 30 ml/min in pvUS and 297 ± 27 ml/min in MRI (p = 0.294), and average BA difference was 25 ml/min [-322; 372]. Inter- and intra-reader results differed very little, revealed excellent correlation (R 2 = 0.98 and 0.99, respectively) and resulted in BA differences of -5 ml/min [-161; 150] and -2 ml/min [-28; 25], respectively. After PV ligature, PV flow decreased from 356 ± 50 to 298 ± 61 ml/min (p = 0.02), and hepatic arterial flow increased from 277 ± 36 to 331 ± 65 ml/min (p = n.s.). CONCLUSION The successful in vivo comparison of radial 4D Flow-MRI to perivascular ultrasound revealed good agreement of abdominal blood flow although with considerable spread of results. A model of pre-hepatic PHTN was successfully introduced and acute responses monitored. KEY POINTS • Radial 4D Flow-MRI in the abdomen was successfully compared to perivascular ultrasound. • Inter- and intra-reader testing demonstrated excellent reproducibility of upper abdominal 4D Flow-MRI. • A porcine model of acute pre-hepatic portal hypertension was successfully introduced. • 4D Flow-MRI successfully monitored acute changes in a model of portal hypertension.
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Affiliation(s)
- A Frydrychowicz
- Department of Radiology, School of Medicine and Public Health, E3/366 Clinical Science Center, University of Wisconsin - Madison, 600 Highland Avenue, Madison, WI, 53792-3252, USA.
- Clinic for Radiology and Nuclear Medicine, University Hospital Schleswig-Holstein, Campus Lübeck, Ratzeburger Allee 160, 23562, Lübeck, Germany.
- University of Lübeck, Lübeck, Germany.
| | - A Roldan-Alzate
- Department of Radiology, School of Medicine and Public Health, E3/366 Clinical Science Center, University of Wisconsin - Madison, 600 Highland Avenue, Madison, WI, 53792-3252, USA
- Department of Mechanical Engineering, University of Wisconsin, Madison, USA
| | - E Winslow
- Department of Surgery, University of Wisconsin, Madison, USA
| | - D Consigny
- Department of Radiology, School of Medicine and Public Health, E3/366 Clinical Science Center, University of Wisconsin - Madison, 600 Highland Avenue, Madison, WI, 53792-3252, USA
| | - C A Campo
- Department of Radiology, School of Medicine and Public Health, E3/366 Clinical Science Center, University of Wisconsin - Madison, 600 Highland Avenue, Madison, WI, 53792-3252, USA
| | - U Motosugi
- Department of Radiology, School of Medicine and Public Health, E3/366 Clinical Science Center, University of Wisconsin - Madison, 600 Highland Avenue, Madison, WI, 53792-3252, USA
| | - K M Johnson
- Department of Medical Physics, University of Wisconsin, Madison, USA
| | - O Wieben
- Department of Radiology, School of Medicine and Public Health, E3/366 Clinical Science Center, University of Wisconsin - Madison, 600 Highland Avenue, Madison, WI, 53792-3252, USA
- Department of Medical Physics, University of Wisconsin, Madison, USA
| | - S B Reeder
- Department of Radiology, School of Medicine and Public Health, E3/366 Clinical Science Center, University of Wisconsin - Madison, 600 Highland Avenue, Madison, WI, 53792-3252, USA
- Department of Medical Physics, University of Wisconsin, Madison, USA
- Department of Biomedical Engineering, University of Wisconsin, Madison, USA
- Department of Medicine, University of Wisconsin, Madison, USA
- Department of Emergency Medicine, University of Wisconsin, Madison, USA
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