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Lamy J, Gonzales RA, Xiang J, Seemann F, Huber S, Steele J, Wieben O, Heiberg E, Peters DC. Tricuspid valve flow measurement using a deep learning framework for automated valve-tracking 2D phase contrast. Magn Reson Med 2024. [PMID: 38817154 DOI: 10.1002/mrm.30163] [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: 09/29/2023] [Revised: 04/17/2024] [Accepted: 05/06/2024] [Indexed: 06/01/2024]
Abstract
PURPOSE Tricuspid valve flow velocities are challenging to measure with cardiovascular MR, as the rapidly moving valvular plane prohibits direct flow evaluation, but they are vitally important to diastolic function evaluation. We developed an automated valve-tracking 2D method for measuring flow through the dynamic tricuspid valve. METHODS Nine healthy subjects and 2 patients were imaged. The approach uses a previously trained deep learning network, TVnet, to automatically track the tricuspid valve plane from long-axis cine images. Subsequently, the tracking information is used to acquire 2D phase contrast (PC) with a dynamic (moving) acquisition plane that tracks the valve. Direct diastolic net flows evaluated from the dynamic PC sequence were compared with flows from 2D-PC scans acquired in a static slice localized at the end-systolic valve position, and also ventricular stroke volumes (SVs) using both planimetry and 2D PC of the great vessels. RESULTS The mean tricuspid valve systolic excursion was 17.8 ± 2.5 mm. The 2D valve-tracking PC net diastolic flow showed excellent correlation with SV by right-ventricle planimetry (bias ± 1.96 SD = -0.2 ± 10.4 mL, intraclass correlation coefficient [ICC] = 0.92) and aortic PC (-1.0 ± 13.8 mL, ICC = 0.87). In comparison, static tricuspid valve 2D PC also showed a strong correlation but had greater bias (p = 0.01) versus the right-ventricle SV (10.6 ± 16.1 mL, ICC = 0.61). In most (8 of 9) healthy subjects, trace regurgitation was measured at begin-systole. In one patient, valve-tracking PC displayed a high-velocity jet (380 cm/s) with maximal velocity agreeing with echocardiography. CONCLUSION Automated valve-tracking 2D PC is a feasible route toward evaluation of tricuspid regurgitant velocities, potentially solving a major clinical challenge.
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Affiliation(s)
- Jérôme Lamy
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, Connecticut, USA
- Sorbonne Université, CNRS, INSERM, Laboratoire d'Imagerie Biomédicale, LIB, Paris, France
| | - Ricardo A Gonzales
- Oxford Center for Clinical Magnetic Resonance Research, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, UK
| | - Jie Xiang
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, Connecticut, USA
| | - Felicia Seemann
- Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Steffen Huber
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, Connecticut, USA
| | - Jeremy Steele
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, Connecticut, USA
| | - Oliver Wieben
- Department of Medical Physics, University of Wisconsin, Madison, Wisconsin, USA
| | - Einar Heiberg
- Department of Clinical Sciences, Lund University, Lund, Sweden
| | - Dana C Peters
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, Connecticut, USA
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Ahn Y, Koo HJ, Kang JW, Yang DH. Tricuspid Valve Imaging and Right Ventricular Function Analysis Using Cardiac CT and MRI. Korean J Radiol 2021; 22:1946-1963. [PMID: 34668349 PMCID: PMC8628151 DOI: 10.3348/kjr.2020.1507] [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: 12/30/2020] [Revised: 05/25/2021] [Accepted: 05/27/2021] [Indexed: 11/28/2022] Open
Abstract
Cardiac computed tomography (CT) and cardiac magnetic resonance imaging (CMR) can reveal the detailed anatomy and function of the tricuspid valve and right ventricle (RV). Quantification of tricuspid regurgitation (TR) and analysis of RV function have prognostic implications. With the recently available transcatheter treatment options for diseases of the tricuspid valve, evaluation of the tricuspid valve using CT and CMR has become important in terms of patient selection and procedural guidance. Moreover, CT enables post-procedural investigation of the causes of valve dysfunction, such as pannus or thrombus. This review describes the anatomy of the tricuspid valve and CT and CMR imaging protocols for right heart evaluation, including RV function and TR analyses. We also demonstrate the pre-procedural planning for transcatheter treatment of TR and imaging of postoperative complications using CT.
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Affiliation(s)
- Yura Ahn
- Department of Radiology and Research Institute of Radiology, Cardiac Imaging Center, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
| | - Hyun Jung Koo
- Department of Radiology and Research Institute of Radiology, Cardiac Imaging Center, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.
| | - Joon-Won Kang
- Department of Radiology and Research Institute of Radiology, Cardiac Imaging Center, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
| | - Dong Hyun Yang
- Department of Radiology and Research Institute of Radiology, Cardiac Imaging Center, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
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Joshi A, Ghadimi Mahani M, Dorfman A, Balasubramanian S. Cardiac MR Evaluation of Repaired Tetralogy of Fallot. Semin Roentgenol 2020; 55:290-300. [PMID: 32859345 DOI: 10.1053/j.ro.2020.06.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Aparna Joshi
- Department of Radiology, Section of Pediatric Radiology, Michigan Medicine, Ann Arbor, MI.
| | - Maryam Ghadimi Mahani
- Department of Radiology, Section of Pediatric Radiology and Division of Cardiothoracic Radiology, Michigan Medicine, Ann Arbor, MI
| | - Adam Dorfman
- Department of Pediatrics, Division of Pediatric Cardiology, Michigan Medicine, Ann Arbor, MI
| | - Sowmya Balasubramanian
- Department of Pediatrics, Division of Pediatric Cardiology, Michigan Medicine, Ann Arbor, MI
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Abstract
PURPOSE OF REVIEW This article will review the current techniques in cardiac magnetic resonance imaging (CMR) for diagnosing and assessing primary valvular heart disease. RECENT FINDINGS The recent advancements in CMR have led to an increased role of this modality for qualifying and quantifying various native valve diseases. Phase-contrast velocity encoded imaging is a well-established technique that can be used to quantify aortic and pulmonic flow. This technique, combined with the improved ability for CMR to obtain accurate left and right ventricular volumetrics, has allowed for increased accuracy and reproducibility in assessing valvular dysfunction. Advancements in CMR technology also allows for improved spatial and temporal resolution imaging of various valves and their regurgitant or stenotic jets. Therefore, CMR can be a powerful tool in evaluation of native valvular heart disease. The role of CMR in assessing valvular heart disease is growing and being recognized in recent guidelines. CMR has the ability to assess valve morphology along with qualifying and quantifying valvular disease. In addition, the ability to obtain accurate volumetric measurements may improve more precise management strategies and may lead to improvements in mortality and morbidity.
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