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Alkassar M, Engelhardt S, Abu-Tair T, Ojeda E, Treffer PC, Weyand M, Rompel O. Comparative Study of 2D-Cine and 3D-wh Volumetry: Revealing Systemic Error of 2D-Cine Volumetry. Diagnostics (Basel) 2023; 13:3162. [PMID: 37891983 PMCID: PMC10605840 DOI: 10.3390/diagnostics13203162] [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: 08/16/2023] [Revised: 09/28/2023] [Accepted: 10/06/2023] [Indexed: 10/29/2023] Open
Abstract
This study investigates the crucial factors influencing the end-systolic and end-diastolic volumes in MRI volumetry and their direct effects on the derived functional parameters. Through the simultaneous acquisition of 2D-cine and 3D whole-heart slices in end-diastole and end-systole, we present a novel direct comparison of the volumetric measurements from both methods. A prospective study was conducted with 18 healthy participants. Both 2D-cine and 3D whole-heart sequences were obtained. Despite the differences in the creation of 3D volumes and trigger points, the impact on the LV volume was minimal (134.9 mL ± 16.9 mL vs. 136.6 mL ± 16.6 mL, p < 0.01 for end-diastole; 50.6 mL ± 11.0 mL vs. 51.6 mL ± 11.2 mL, p = 0.03 for end-systole). In our healthy patient cohort, a systematic underestimation of the end-systolic volume resulted in a significant overestimation of the SV (5.6 mL ± 2.6 mL, p < 0.01). The functional calculations from the 3D whole-heart method proved to be highly accurate and correlated well with function measurements from the phase-contrast sequences. Our study is the first to demonstrate the superiority of 3D whole-heart volumetry over 2D-cine volumetry and sheds light on the systematic error inherent in 2D-cine measurements.
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Affiliation(s)
- Muhnnad Alkassar
- Department of Cardiac Surgery, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany; (S.E.); (M.W.)
- Department of Pediatrics, Paracelsus Medical School, General Hospital of Nuremberg, 90419 Nuremberg, Germany
| | - Sophia Engelhardt
- Department of Cardiac Surgery, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany; (S.E.); (M.W.)
| | - Tariq Abu-Tair
- Department of Congenital Heart Disease, Centre for Diseases in Childhood and Adolescence, University Medicine Mainz, 55131 Mainz, Germany;
| | - Efren Ojeda
- Siemens Healtineers, 91052 Erlangen, Germany; (E.O.); (P.C.T.)
| | | | - Michael Weyand
- Department of Cardiac Surgery, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany; (S.E.); (M.W.)
| | - Oliver Rompel
- Institute of Radiology, University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany;
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Appadurai V, Safdur T, Narang A. Assessment of Right Ventricle Function and Tricuspid Regurgitation in Heart Failure: Current Advances in Diagnosis and Imaging. Heart Fail Clin 2023; 19:317-328. [PMID: 37230647 DOI: 10.1016/j.hfc.2023.02.002] [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: 05/27/2023]
Abstract
Right ventricular (RV) systolic dysfunction increases mortality among heart failure patients, and therefore, accurate diagnosis and monitoring is paramount. RV anatomy and function are complex, usually requiring a combination of imaging modalities to completely quantitate volumes and function. Tricuspid regurgitation usually occurs with RV dysfunction, and quantifying this valvular lesion also may require multiple imaging modalities. Echocardiography is the first-line imaging tool for identifying RV dysfunction, with cardiac MRI and cardiac computed tomography adding valuable additional information.
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Affiliation(s)
- Vinesh Appadurai
- Bluhm Cardiovascular Institute, Northwestern University, 676 North St Clair Street Suite 19-100 Galter Pavilion, Chicago, IL 60611, USA; School of Medicine, The University of Queensland, St Lucia, QLD, 4067 Australia
| | - Taimur Safdur
- Bluhm Cardiovascular Institute, Northwestern University, 676 North St Clair Street Suite 19-100 Galter Pavilion, Chicago, IL 60611, USA
| | - Akhil Narang
- Bluhm Cardiovascular Institute, Northwestern University, 676 North St Clair Street Suite 19-100 Galter Pavilion, Chicago, IL 60611, USA.
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Gooty VD, Veeram Reddy SR, Greer JS, Blair Z, Zahr RA, Arar Y, Castellanos DA, Pimplawar S, Greil GF, Dillenbeck J, Hussain T. Lymphatic pathway evaluation in congenital heart disease using 3D whole-heart balanced steady state free precession and T2-weighted cardiovascular magnetic resonance. J Cardiovasc Magn Reson 2021; 23:16. [PMID: 33641664 PMCID: PMC7919323 DOI: 10.1186/s12968-021-00707-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 01/06/2021] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Due to passive blood flow in palliated single ventricle, central venous pressure increases chronically, ultimately impeding lymphatic drainage. Early visualization and treatment of these malformations is essential to reduce morbidity and mortality. Cardiovascular magnetic resonance (CMR) T2-weighted lymphangiography (T2w) is used for lymphatic assessment, but its low signal-to-noise ratio may result in incomplete visualization of thoracic duct pathway. 3D-balanced steady state free precession (3D-bSSFP) is commonly used to assess congenital cardiac disease anatomy. Here, we aimed to improve diagnostic imaging of thoracic duct pathway using 3D-bSSFP. METHODS Patients underwent CMR during single ventricle or central lymphatic system assessment using T2w and 3D-bSSFP. T2w parameters included 3D-turbo spin echo (TSE), TE/TR = 600/2500 ms, resolution = 1 × 1 × 1.8 mm, respiratory triggering with bellows. 3D-bSSFP parameters included electrocardiogram triggering and diaphragm navigator, 1.6 mm isotropic resolution, TE/TR = 1.8/3.6 ms. Thoracic duct was identified independently in T2w and 3D-bSSFP images, tracked completely from cisterna chyli to its drainage site, and classified based on severity of lymphatic abnormalities. RESULTS Forty-eight patients underwent CMR, 46 of whom were included in the study. Forty-five had congenital heart disease with single ventricle physiology. Median age at CMR was 4.3 year (range 0.9-35.1 year, IQR 2.4 year), and median weight was 14.4 kg (range, 7.9-112.9 kg, IQR 5.2 kg). Single ventricle with right dominant ventricle was noted in 31 patients. Thirty-eight patients (84%) were status post bidirectional Glenn and 7 (16%) were status post Fontan anastomosis. Thoracic duct visualization was achieved in 45 patients by T2w and 3D-bSSFP. Complete tracking to drainage site was attained in 11 patients (24%) by T2w vs 25 (54%) by 3D-bSSFP and in 28 (61%) by both. Classification of lymphatics was performed in 31 patients. CONCLUSION Thoracic duct pathway can be visualized by 3D-bSSFP combined with T2w lymphangiography. Cardiac triggering and respiratory navigation likely help retain lymphatic signal in the retrocardiac area by 3D-bSSFP. Visualizing lymphatic system leaks is challenging on 3D-bSSFP images alone, but 3D-bSSFP offers good visualization of duct anatomy and landmark structures to help plan interventions. Together, these sequences can define abnormal lymphatic pathway following single ventricle palliative surgery, thus guiding lymphatic interventional procedures.
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Affiliation(s)
- Vasu D Gooty
- Department of Pediatrics, Division of Pediatric Cardiology, University of Tennessee Health Science Center, Le Bonheur Children's Hospital, 49N Dunlap Street, 3rd Floor, Memphis, TN, 38015, USA.
- Department of Pediatrics, Division of Pediatric Cardiology, University of Texas Southwestern Medical Center, Dallas Children's Medical Center, Dallas, TX, USA.
| | - Surendranath R Veeram Reddy
- Department of Pediatrics, Division of Pediatric Cardiology, University of Texas Southwestern Medical Center, Dallas Children's Medical Center, Dallas, TX, USA
| | - Joshua S Greer
- Department of Pediatrics, Division of Pediatric Cardiology, University of Texas Southwestern Medical Center, Dallas Children's Medical Center, Dallas, TX, USA
| | - Zachary Blair
- University of Texas Southwestern Medical School, Dallas, TX, USA
| | - Riad Abou Zahr
- Department of Pediatrics, Division of Pediatric Cardiology, University of Texas Southwestern Medical Center, Dallas Children's Medical Center, Dallas, TX, USA
| | - Yousef Arar
- Department of Pediatrics, Division of Pediatric Cardiology, University of Texas Southwestern Medical Center, Dallas Children's Medical Center, Dallas, TX, USA
| | - Daniel A Castellanos
- Department of Pediatrics, Division of Pediatric Cardiology, University of Texas Southwestern Medical Center, Dallas Children's Medical Center, Dallas, TX, USA
| | - Sheena Pimplawar
- Department of Pediatric Radiology, University of Texas Southwestern Medical Center, Dallas Children's Medical Center, Dallas, TX, USA
| | - Gerald F Greil
- Department of Pediatrics, Division of Pediatric Cardiology, University of Texas Southwestern Medical Center, Dallas Children's Medical Center, Dallas, TX, USA
| | - Jeanne Dillenbeck
- Department of Pediatric Radiology, University of Texas Southwestern Medical Center, Dallas Children's Medical Center, Dallas, TX, USA
| | - Tarique Hussain
- Department of Pediatrics, Division of Pediatric Cardiology, University of Texas Southwestern Medical Center, Dallas Children's Medical Center, Dallas, TX, USA
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Zitzelsberger T, Krumm P, Hornung A, Kramer U, Nikolaou K, Schäfer JF, Schick F, Sieverding L, Martirosian P. Multi-phase coronary magnetic resonance angiography improves delineation of coronary arteries. Acta Radiol 2019; 60:1422-1429. [PMID: 30799635 DOI: 10.1177/0284185119830289] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Tanja Zitzelsberger
- Department of Diagnostic and Interventional Radiology, University of Tuebingen, Germany
| | - Patrick Krumm
- Department of Diagnostic and Interventional Radiology, University of Tuebingen, Germany
| | - Andreas Hornung
- Department of Pediatric Cardiology, University of Tuebingen, Germany
| | - Ulrich Kramer
- Department of Diagnostic and Interventional Radiology, University of Tuebingen, Germany
| | - Konstantin Nikolaou
- Department of Diagnostic and Interventional Radiology, University of Tuebingen, Germany
| | - Jürgen F Schäfer
- Department of Diagnostic and Interventional Radiology, University of Tuebingen, Germany
| | - Fritz Schick
- Department of Diagnostic and Interventional Radiology, Section on Experimental Radiology, University of Tuebingen, Germany
| | - Ludger Sieverding
- Department of Pediatric Cardiology, University of Tuebingen, Germany
| | - Petros Martirosian
- Department of Diagnostic and Interventional Radiology, Section on Experimental Radiology, University of Tuebingen, Germany
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Munoz C, Neji R, Kunze KP, Nekolla SG, Botnar RM, Prieto C. Respiratory- and cardiac motion-corrected simultaneous whole-heart PET and dual phase coronary MR angiography. Magn Reson Med 2019; 81:1671-1684. [PMID: 30320931 PMCID: PMC6492195 DOI: 10.1002/mrm.27517] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 07/25/2018] [Accepted: 08/13/2018] [Indexed: 01/07/2023]
Abstract
PURPOSE To develop a framework for efficient and simultaneous acquisition of motion-compensated whole-heart coronary MR angiography (CMRA) and left ventricular function by MR and myocardial integrity by PET on a 3T PET-MR system. METHODS An acquisition scheme based on a dual-phase CMRA sequence acquired simultaneously with cardiac PET data has been developed. The framework is integrated with a motion-corrected image reconstruction approach, so that non-rigid respiratory and cardiac deformation fields estimated from MR images are used to correct both the CMRA (respiratory motion correction for each cardiac phase) and the PET data (respiratory and cardiac motion correction). The proposed approach was tested in a cohort of 8 healthy subjects and 6 patients with coronary artery disease. Left ventricular (LV) function estimated from motion-corrected dual-phase CMRA was compared to the gold standard estimated from a stack of 2D CINE images for the healthy subjects. Relative increase of signal in motion-corrected PET images compared to uncorrected images was computed for standard 17-segment polar maps for each patient. RESULTS Motion-corrected dual-phase CMRA images allow for visualization of the coronary arteries in both systole and diastole for all healthy subjects and cardiac patients. LV functional indices from healthy subjects result in good agreement with the reference method, underestimating stroke volume by 3.07 ± 3.26 mL and ejection fraction by 0.30 ± 1.01%. Motion correction improved delineation of the myocardium in PET images, resulting in an increased 18 F-FDG signal of up to 28% in basal segments of the myocardial wall compared to uncorrected images. CONCLUSION The proposed motion-corrected dual-phase CMRA and cardiac PET produces co-registered good quality images in both modalities in a single efficient examination of ~13 min.
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Affiliation(s)
- Camila Munoz
- King’s College London, School of Biomedical Engineering and Imaging SciencesLondonUnited Kingdom
| | - Radhouene Neji
- King’s College London, School of Biomedical Engineering and Imaging SciencesLondonUnited Kingdom
- Siemens Healthcare, MR Research CollaborationsFrimleyUnited Kingdom
| | - Karl P. Kunze
- Technische Universität München, Nuklearmedizinische Klinik und PoliklinikMunichGermany
| | - Stephan G. Nekolla
- Technische Universität München, Nuklearmedizinische Klinik und PoliklinikMunichGermany
- DZHK (Deutsches Zentrum für Herz‐Kreislauf‐Forschung e.V.), partner site Munich Heart AllianceMunichGermany
| | - Rene M. Botnar
- King’s College London, School of Biomedical Engineering and Imaging SciencesLondonUnited Kingdom
- Pontificia Universidad Catolica de Chile, Escuela de IngenieriaSantiagoChile
| | - Claudia Prieto
- King’s College London, School of Biomedical Engineering and Imaging SciencesLondonUnited Kingdom
- Pontificia Universidad Catolica de Chile, Escuela de IngenieriaSantiagoChile
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The importance of the pericardium for cardiac biomechanics: from physiology to computational modeling. Biomech Model Mechanobiol 2018; 18:503-529. [DOI: 10.1007/s10237-018-1098-4] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Accepted: 11/18/2018] [Indexed: 10/27/2022]
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Moyé DM, Hussain T, Botnar RM, Tandon A, Greil GF, Dyer AK, Henningsson M. Dual-phase whole-heart imaging using image navigation in congenital heart disease. BMC Med Imaging 2018; 18:36. [PMID: 30326847 PMCID: PMC6192322 DOI: 10.1186/s12880-018-0278-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Accepted: 10/01/2018] [Indexed: 02/04/2023] Open
Abstract
Background Dual-phase 3-dimensional whole-heart acquisition allows simultaneous imaging during systole and diastole. Respiratory navigator gating and tracking of the diaphragm is used with limited accuracy. Prolonged scan time is common, and navigation often fails in patients with erratic breathing. Image-navigation (iNAV) tracks movement of the heart itself and is feasible in single phase whole heart imaging. To evaluate its diagnostic ability in congenital heart disease, we sought to apply iNAV to dual-phase sequencing. Methods Healthy volunteers and patients with congenital heart disease underwent dual-phase imaging using the conventional diaphragmatic-navigation (dNAV) and iNAV. Acquisition time was recorded and image quality assessed. Sharpness and length of the right coronary (RCA), left anterior descending (LAD), and circumflex (LCx) arteries were measured in both cardiac phases for both approaches. Qualitative and quantitative analyses were performed in a blinded and randomized fashion. Results In volunteers, there was no significant difference in vessel sharpness between approaches (p > 0.05). In patients, analysis showed equal vessel sharpness for LAD and RCA (p > 0.05). LCx sharpness was greater with dNAV (p < 0.05). Visualized length with iNAV was 0.5 ± 0.4 cm greater than that with dNAV for LCx in diastole (p < 0.05), 1.0 ± 0.3 cm greater than dNAV for LAD in diastole (p < 0.05), and 0.8 ± 0.7 cm greater than dNAV for RCA in systole (p < 0.05). Qualitative scores were similar between modalities (p = 0.71). Mean iNAV scan time was 5:18 ± 2:12 min shorter than mean dNAV scan time in volunteers (p = 0.0001) and 3:16 ± 1:12 min shorter in patients (p = 0.0001). Conclusions Image quality of iNAV and dNAV was similar with better distal vessel visualization with iNAV. iNAV acquisition time was significantly shorter. Complete cardiac diagnosis was achieved. Shortened acquisition time will improve clinical applicability and patient comfort.
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Affiliation(s)
- Danielle M Moyé
- Department of Pediatrics, Division of Cardiology, UT Southwestern Medical Center Dallas, Dallas, TX, USA. .,Department of Pediatrics, Division of Cardiology, Children's Health, Children's Medical Center Dallas, Dallas, TX, USA. .,Pediatric Cardiology, Children's Health Children's Medical Center of Dallas, 1935 Medical District Drive, Dallas, TX, 75235, USA.
| | - Tarique Hussain
- Department of Pediatrics, Division of Cardiology, UT Southwestern Medical Center Dallas, Dallas, TX, USA.,Department of Pediatrics, Division of Cardiology, Children's Health, Children's Medical Center Dallas, Dallas, TX, USA.,Departments of Radiology and Biomedical Engineering, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Rene M Botnar
- Division of Imaging Sciences, King's College London, London, UK.,Pontificia Universidad Católica de Chile, Escuela de Ingeniería, Santiago, Chile
| | - Animesh Tandon
- Department of Pediatrics, Division of Cardiology, UT Southwestern Medical Center Dallas, Dallas, TX, USA.,Department of Pediatrics, Division of Cardiology, Children's Health, Children's Medical Center Dallas, Dallas, TX, USA.,Departments of Radiology and Biomedical Engineering, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Gerald F Greil
- Department of Pediatrics, Division of Cardiology, UT Southwestern Medical Center Dallas, Dallas, TX, USA.,Department of Pediatrics, Division of Cardiology, Children's Health, Children's Medical Center Dallas, Dallas, TX, USA.,Departments of Radiology and Biomedical Engineering, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Adrian K Dyer
- Department of Pediatrics, Division of Cardiology, UT Southwestern Medical Center Dallas, Dallas, TX, USA.,Department of Pediatrics, Division of Cardiology, Children's Health, Children's Medical Center Dallas, Dallas, TX, USA
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Goo HW. Comparison between Three-Dimensional Navigator-Gated Whole-Heart MRI and Two-Dimensional Cine MRI in Quantifying Ventricular Volumes. Korean J Radiol 2018; 19:704-714. [PMID: 29962876 PMCID: PMC6005949 DOI: 10.3348/kjr.2018.19.4.704] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 01/19/2018] [Indexed: 11/15/2022] Open
Abstract
Objective To test whether the method utilizing three-dimensional (3D) whole-heart MRI has an additional benefit over that utilizing conventional two-dimensional (2D) cine MRI in quantifying ventricular volumes. Materials and Methods In 110 patients with congenital heart disease, a navigator-gated, 3D whole-heart MRI during end-systole (ES) and end-diastole (ED), 2D short-axis cine MRI, and phase contrast MRI of the great arteries were acquired. Ventricular volumes were measured by using a 3D threshold-based segmentation for 3D whole-heart MRI and by using a simplified contouring for 2D cine MRI. The cardiac trigger delays of 3D whole-heart MRI were compared with those of a 2D cine MRI. The stroke volumes calculated from the ventricular volumes were compared with the arterial flow volumes, measured by phase contrast MRI. Results The ES and ED trigger delays of whole-heart MRI were significantly less than cine MRI for both the left ventricle (−16.8 ± 35.9 ms for ES, −59.0 ± 90.4 ms for ED; p < 0.001) and the right ventricle (−58.8 ± 30.6 ms for ES, −104.9 ± 92.7 ms for ED; p < 0.001). Compared with the arterial flow volumes, 2D cine MRI significantly overestimated the left ventricular stroke volumes (8.7 ± 8.9 mL, p < 0.001) and the 3D whole-heart MRI significantly underestimated the right ventricular stroke volumes (−22.7 ± 22.9 mL, p < 0.001). Conclusion Three-dimensional whole-heart MRI is often subject to early timing of the ED phase, potentially leading to the underestimation of the right ventricular stroke volumes.
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Affiliation(s)
- Hyun Woo Goo
- Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul 05505, Korea
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Hoermann JM, Bertoglio C, Kronbichler M, Pfaller MR, Chabiniok R, Wall WA. An adaptive hybridizable discontinuous Galerkin approach for cardiac electrophysiology. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN BIOMEDICAL ENGINEERING 2018; 34:e2959. [PMID: 29316340 DOI: 10.1002/cnm.2959] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 12/13/2017] [Accepted: 12/27/2017] [Indexed: 06/07/2023]
Abstract
Cardiac electrophysiology simulations are numerically challenging because of the propagation of a steep electrochemical wave front and thus require discretizations with small mesh sizes to obtain accurate results. In this work, we present an approach based on the hybridizable discontinuous Galerkin method (HDG), which allows an efficient implementation of high-order discretizations into a computational framework. In particular, using the advantage of the discontinuous function space, we present an efficient p-adaptive strategy for accurately tracking the wave front. The HDG allows to reduce the overall degrees of freedom in the final linear system to those only on the element interfaces. Additionally, we propose a rule for a suitable integration accuracy for the ionic current term depending on the polynomial order and the cell model to handle high-order polynomials. Our results show that for the same number of degrees of freedom, coarse high-order elements provide more accurate results than fine low-order elements. Introducing p-adaptivity further reduces computational costs while maintaining accuracy by restricting the use of high-order elements to resolve the wave front. For a patient-specific simulation of a cardiac cycle, p-adaptivity reduces the average number of degrees of freedom by 95% compared to the nonadaptive model. In addition to reducing computational costs, using coarse meshes with our p-adaptive high-order HDG method also simplifies practical aspects of mesh generation and postprocessing.
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Affiliation(s)
- Julia M Hoermann
- Institute for Computational Mechanics, Technical University Munich, Boltzmannstr 15, Garching b. München, 85748, Germany
| | - Cristóbal Bertoglio
- Center for Mathematical Modeling, Universidad de Chile, Beaucheff 851, Santiago 8370456, Chile
- Johann Bernoulli Institute, University of Groningen, Nijenborgh 9, Groningen, 9747 HZ, Netherlands
| | - Martin Kronbichler
- Institute for Computational Mechanics, Technical University Munich, Boltzmannstr 15, Garching b. München, 85748, Germany
| | - Martin R Pfaller
- Institute for Computational Mechanics, Technical University Munich, Boltzmannstr 15, Garching b. München, 85748, Germany
| | - Radomir Chabiniok
- Inria, Paris-Saclay University, Palaiseau, France
- LMS, Ecole Polytechnique, CNRS, Paris-Saclay University, Palaiseau, France
- School of Biomedical Engineering and Imaging Sciences (BMEIS), St Thomas' Hospital, King's College, London, UK
| | - Wolfgang A Wall
- Institute for Computational Mechanics, Technical University Munich, Boltzmannstr 15, Garching b. München, 85748, Germany
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Trinh B, Dubin I, Rahman O, Ferreira Botelho MP, Naro N, Carr JC, Collins JD, Barker AJ. Aortic Volumetry at Contrast-Enhanced Magnetic Resonance Angiography: Feasibility as a Sensitive Method for Monitoring Bicuspid Aortic Valve Aortopathy. Invest Radiol 2017; 52:216-222. [PMID: 27861233 PMCID: PMC5339069 DOI: 10.1097/rli.0000000000000332] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVES Bicuspid aortic valve patients can develop thoracic aortic aneurysms and therefore require serial imaging to monitor aortic growth. This study investigates the reliability of contrast-enhanced magnetic resonance angiography (CEMRA) volumetry compared with 2-dimensional diameter measurements to identify thoracic aortic aneurysm growth. MATERIALS AND METHODS A retrospective, institutional review board-approved, and Health Insurance Portability and Accountability Act-compliant study was conducted on 20 bicuspid aortic valve patients (45 ± 8.9 years, 20% women) who underwent serial CEMRA with a minimum imaging follow-up of 11 months. Magnetic resonance imaging was performed at 1.5 T with electrocardiogram-gated, time-resolved CEMRA. Independent observers measured the diameter at the sinuses of Valsalva (SOVs) and mid ascending aorta (MAA) as well as ascending aorta volume between the aortic valve annulus and innominate branch. Intraobserver/interobserver coefficient of variation (COV) and intraclass correlation coefficient (ICC) were computed to assess reliability. Growth rates were calculated and assessed by Student t test (P < 0.05, significant). The diameter of maximal growth (DMG), defined as the diameter at SOV or MAA with the faster growth rate, was recorded. RESULTS The mean time of follow-up was 2.6 ± 0.82 years. The intraobserver COV was 0.01 for SOV, 0.02 for MAA, and 0.02 for volume (interobserver COV: 0.02, 0.03, 0.04, respectively). The ICC was 0.83 for SOV, 0.86 for MAA, 0.90 for DMG, and 0.95 for volume. Average aortic measurements at baseline and (follow-up) were 42 ± 3 mm (42 ± 3 mm, P = 0.11) at SOV, 46 ± 4 mm (47 ± 4 mm, P < 0.05) at MAA, and 130 ± 23 mL (144 ± 24 mL, P < 0.05). Average size changes were 0.2 ± 0.6 mm/y (1% ± 2%) at SOV, 0.5 ± 0.8 mm/y (1% ± 2%) at MAA, 0.7 ± 0.7 mm/y (2% ± 2%) at DMG, and 6 ± 3 mL/y (4% ± 3%) with volumetry. CONCLUSIONS Three-dimensional CEMRA volumetry exhibited a larger effect when examining percentage growth, a better ICC, and a marginally lower COV. Volumetry may be more sensitive to growth and possibly less affected by error than diameter measurements.
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Affiliation(s)
- Brian Trinh
- Northwestern University, Feinberg School of Medicine
| | - Iram Dubin
- UCLA Medical Center, Department of Radiology
| | - Ozair Rahman
- Northwestern University, Feinberg School of Medicine Department of Radiology
| | | | - Nicholas Naro
- Northwestern University, Feinberg School of Medicine
| | - James C Carr
- Northwestern University, Feinberg School of Medicine Department of Radiology
| | - Jeremy D Collins
- Northwestern University, Feinberg School of Medicine Department of Radiology
| | - Alex J Barker
- Northwestern University, Feinberg School of Medicine Department of Radiology
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11
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Greil G, Tandon AA, Silva Vieira M, Hussain T. 3D Whole Heart Imaging for Congenital Heart Disease. Front Pediatr 2017; 5:36. [PMID: 28289674 PMCID: PMC5327357 DOI: 10.3389/fped.2017.00036] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Accepted: 02/10/2017] [Indexed: 12/20/2022] Open
Abstract
Three-dimensional (3D) whole heart techniques form a cornerstone in cardiovascular magnetic resonance imaging of congenital heart disease (CHD). It offers significant advantages over other CHD imaging modalities and techniques: no ionizing radiation; ability to be run free-breathing; ECG-gated dual-phase imaging for accurate measurements and tissue properties estimation; and higher signal-to-noise ratio and isotropic voxel resolution for multiplanar reformatting assessment. However, there are limitations, such as potentially long acquisition times with image quality degradation. Recent advances in and current applications of 3D whole heart imaging in CHD are detailed, as well as future directions.
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Affiliation(s)
- Gerald Greil
- Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, TX, USA; Department of Radiology, University of Texas Southwestern Medical Center, Dallas, TX, USA; Department of Biomedical Engineering, University of Texas Southwestern Medical Center, Dallas, TX, USA; Division of Pediatric Cardiology, Children's Medical Center Dallas, Dallas, TX, USA; Division of Imaging Sciences and Biomedical Engineering, King's College London, London, UK
| | - Animesh Aashoo Tandon
- Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, TX, USA; Department of Radiology, University of Texas Southwestern Medical Center, Dallas, TX, USA; Department of Biomedical Engineering, University of Texas Southwestern Medical Center, Dallas, TX, USA; Division of Pediatric Cardiology, Children's Medical Center Dallas, Dallas, TX, USA
| | - Miguel Silva Vieira
- Division of Imaging Sciences and Biomedical Engineering, King's College London , London , UK
| | - Tarique Hussain
- Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, TX, USA; Department of Radiology, University of Texas Southwestern Medical Center, Dallas, TX, USA; Department of Biomedical Engineering, University of Texas Southwestern Medical Center, Dallas, TX, USA; Division of Pediatric Cardiology, Children's Medical Center Dallas, Dallas, TX, USA; Division of Imaging Sciences and Biomedical Engineering, King's College London, London, UK
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12
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Asner L, Hadjicharalambous M, Chabiniok R, Peresutti D, Sammut E, Wong J, Carr-White G, Chowienczyk P, Lee J, King A, Smith N, Razavi R, Nordsletten D. Estimation of passive and active properties in the human heart using 3D tagged MRI. Biomech Model Mechanobiol 2016; 15:1121-39. [PMID: 26611908 PMCID: PMC5021775 DOI: 10.1007/s10237-015-0748-z] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Accepted: 11/09/2015] [Indexed: 11/21/2022]
Abstract
Advances in medical imaging and image processing are paving the way for personalised cardiac biomechanical modelling. Models provide the capacity to relate kinematics to dynamics and-through patient-specific modelling-derived material parameters to underlying cardiac muscle pathologies. However, for clinical utility to be achieved, model-based analyses mandate robust model selection and parameterisation. In this paper, we introduce a patient-specific biomechanical model for the left ventricle aiming to balance model fidelity with parameter identifiability. Using non-invasive data and common clinical surrogates, we illustrate unique identifiability of passive and active parameters over the full cardiac cycle. Identifiability and accuracy of the estimates in the presence of controlled noise are verified with a number of in silico datasets. Unique parametrisation is then obtained for three datasets acquired in vivo. The model predictions show good agreement with the data extracted from the images providing a pipeline for personalised biomechanical analysis.
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Affiliation(s)
- Liya Asner
- Division of Imaging Sciences and Biomedical Engineering, St Thomas' Hospital, King's College London, 4th Floor, Lambeth Wing, London, SE1 7EH, UK.
| | - Myrianthi Hadjicharalambous
- Division of Imaging Sciences and Biomedical Engineering, St Thomas' Hospital, King's College London, 4th Floor, Lambeth Wing, London, SE1 7EH, UK
| | - Radomir Chabiniok
- Division of Imaging Sciences and Biomedical Engineering, St Thomas' Hospital, King's College London, 4th Floor, Lambeth Wing, London, SE1 7EH, UK
- Inria Saclay Ile-de-France, MΞDISIM Team, Palaiseau, France
| | - Devis Peresutti
- Division of Imaging Sciences and Biomedical Engineering, St Thomas' Hospital, King's College London, 4th Floor, Lambeth Wing, London, SE1 7EH, UK
| | - Eva Sammut
- Division of Imaging Sciences and Biomedical Engineering, St Thomas' Hospital, King's College London, 4th Floor, Lambeth Wing, London, SE1 7EH, UK
| | - James Wong
- Division of Imaging Sciences and Biomedical Engineering, St Thomas' Hospital, King's College London, 4th Floor, Lambeth Wing, London, SE1 7EH, UK
| | - Gerald Carr-White
- Division of Imaging Sciences and Biomedical Engineering, St Thomas' Hospital, King's College London, 4th Floor, Lambeth Wing, London, SE1 7EH, UK
- Department of Cardiology, Guy's and St Thomas' NHS Foundation Trust, London, SE1 7EH, UK
| | - Philip Chowienczyk
- Department of Clinical Pharmacology, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Jack Lee
- Division of Imaging Sciences and Biomedical Engineering, St Thomas' Hospital, King's College London, 4th Floor, Lambeth Wing, London, SE1 7EH, UK
| | - Andrew King
- Division of Imaging Sciences and Biomedical Engineering, St Thomas' Hospital, King's College London, 4th Floor, Lambeth Wing, London, SE1 7EH, UK
| | - Nicolas Smith
- Division of Imaging Sciences and Biomedical Engineering, St Thomas' Hospital, King's College London, 4th Floor, Lambeth Wing, London, SE1 7EH, UK
- Faculty of Engineering, University of Auckland, Auckland, New Zealand
| | - Reza Razavi
- Division of Imaging Sciences and Biomedical Engineering, St Thomas' Hospital, King's College London, 4th Floor, Lambeth Wing, London, SE1 7EH, UK
| | - David Nordsletten
- Division of Imaging Sciences and Biomedical Engineering, St Thomas' Hospital, King's College London, 4th Floor, Lambeth Wing, London, SE1 7EH, UK
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13
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Letelier K, Urbina J, Andía M, Tejos C, Irarrazaval P, Prieto C, Uribe S. Accelerating dual cardiac phase images using undersampled radial phase encoding trajectories. Magn Reson Imaging 2016; 34:1017-25. [PMID: 27067473 DOI: 10.1016/j.mri.2016.03.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2015] [Revised: 03/25/2016] [Accepted: 03/27/2016] [Indexed: 10/22/2022]
Abstract
A three-dimensional dual-cardiac-phase (3D-DCP) scan has been proposed to acquire two data sets of the whole heart and great vessels during the end-diastolic and end-systolic cardiac phases in a single free-breathing scan. This method has shown accurate assessment of cardiac anatomy and function but is limited by long acquisition times. This work proposes to accelerate the acquisition and reconstruction of 3D-DCP scans by exploiting redundant information of the outer k-space regions of both cardiac phases. This is achieved using a modified radial-phase-encoding trajectory and gridding reconstruction with uniform coil combination. The end-diastolic acquisition trajectory was angularly shifted with respect to the end-systolic phase. Initially, a fully-sampled 3D-DCP scan was acquired to determine the optimal percentage of the outer k-space data that can be combined between cardiac phases. Thereafter, prospectively undersampled data were reconstructed based on this percentage. As gold standard images, the undersampled data were also reconstructed using iterative SENSE. To validate the method, image quality assessments and a cardiac volume analysis were performed. The proposed method was tested in thirteen healthy volunteers (mean age, 30years). Prospectively undersampled data (R=4) reconstructed with 50% combination led high quality images. There were no significant differences in the image quality and in the cardiac volume analysis between our method and iterative SENSE. In addition, the proposed approach reduced the reconstruction time from 40min to 1min. In conclusion, the proposed method obtains 3D-DCP scans with an image quality comparable to those reconstructed with iterative SENSE, and within a clinically acceptable reconstruction time.
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Affiliation(s)
- Karis Letelier
- Biomedical Imaging Center, Pontificia Universidad Católica de Chile, Santiago, Chile; Electrical Engineering Department, Faculty of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Jesus Urbina
- Biomedical Imaging Center, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Marcelo Andía
- Biomedical Imaging Center, Pontificia Universidad Católica de Chile, Santiago, Chile; Radiology Department, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Cristián Tejos
- Biomedical Imaging Center, Pontificia Universidad Católica de Chile, Santiago, Chile; Electrical Engineering Department, Faculty of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Pablo Irarrazaval
- Biomedical Imaging Center, Pontificia Universidad Católica de Chile, Santiago, Chile; Electrical Engineering Department, Faculty of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Claudia Prieto
- Division of imaging sciences, King's College London, London, UK
| | - Sergio Uribe
- Biomedical Imaging Center, Pontificia Universidad Católica de Chile, Santiago, Chile; Radiology Department, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile.
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14
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Asner L, Hadjicharalambous M, Chabiniok R, Peresutti D, Sammut E, Wong J, Carr-White G, Chowienczyk P, Lee J, King A, Smith N, Razavi R, Nordsletten D. Estimation of passive and active properties in the human heart using 3D tagged MRI. Biomech Model Mechanobiol 2015. [PMID: 26611908 DOI: 10.1007/s10237‐015‐0748‐z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/29/2022]
Abstract
Advances in medical imaging and image processing are paving the way for personalised cardiac biomechanical modelling. Models provide the capacity to relate kinematics to dynamics and-through patient-specific modelling-derived material parameters to underlying cardiac muscle pathologies. However, for clinical utility to be achieved, model-based analyses mandate robust model selection and parameterisation. In this paper, we introduce a patient-specific biomechanical model for the left ventricle aiming to balance model fidelity with parameter identifiability. Using non-invasive data and common clinical surrogates, we illustrate unique identifiability of passive and active parameters over the full cardiac cycle. Identifiability and accuracy of the estimates in the presence of controlled noise are verified with a number of in silico datasets. Unique parametrisation is then obtained for three datasets acquired in vivo. The model predictions show good agreement with the data extracted from the images providing a pipeline for personalised biomechanical analysis.
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Affiliation(s)
- Liya Asner
- Division of Imaging Sciences and Biomedical Engineering, St Thomas' Hospital, King's College London, 4th Floor, Lambeth Wing, London, SE1 7EH, UK.
| | - Myrianthi Hadjicharalambous
- Division of Imaging Sciences and Biomedical Engineering, St Thomas' Hospital, King's College London, 4th Floor, Lambeth Wing, London, SE1 7EH, UK
| | - Radomir Chabiniok
- Division of Imaging Sciences and Biomedical Engineering, St Thomas' Hospital, King's College London, 4th Floor, Lambeth Wing, London, SE1 7EH, UK.,Inria Saclay Ile-de-France, MΞDISIM Team, Palaiseau, France
| | - Devis Peresutti
- Division of Imaging Sciences and Biomedical Engineering, St Thomas' Hospital, King's College London, 4th Floor, Lambeth Wing, London, SE1 7EH, UK
| | - Eva Sammut
- Division of Imaging Sciences and Biomedical Engineering, St Thomas' Hospital, King's College London, 4th Floor, Lambeth Wing, London, SE1 7EH, UK
| | - James Wong
- Division of Imaging Sciences and Biomedical Engineering, St Thomas' Hospital, King's College London, 4th Floor, Lambeth Wing, London, SE1 7EH, UK
| | - Gerald Carr-White
- Division of Imaging Sciences and Biomedical Engineering, St Thomas' Hospital, King's College London, 4th Floor, Lambeth Wing, London, SE1 7EH, UK.,Department of Cardiology, Guy's and St Thomas' NHS Foundation Trust, London, SE1 7EH, UK
| | - Philip Chowienczyk
- Department of Clinical Pharmacology, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Jack Lee
- Division of Imaging Sciences and Biomedical Engineering, St Thomas' Hospital, King's College London, 4th Floor, Lambeth Wing, London, SE1 7EH, UK
| | - Andrew King
- Division of Imaging Sciences and Biomedical Engineering, St Thomas' Hospital, King's College London, 4th Floor, Lambeth Wing, London, SE1 7EH, UK
| | - Nicolas Smith
- Division of Imaging Sciences and Biomedical Engineering, St Thomas' Hospital, King's College London, 4th Floor, Lambeth Wing, London, SE1 7EH, UK.,Faculty of Engineering, University of Auckland, Auckland, New Zealand
| | - Reza Razavi
- Division of Imaging Sciences and Biomedical Engineering, St Thomas' Hospital, King's College London, 4th Floor, Lambeth Wing, London, SE1 7EH, UK
| | - David Nordsletten
- Division of Imaging Sciences and Biomedical Engineering, St Thomas' Hospital, King's College London, 4th Floor, Lambeth Wing, London, SE1 7EH, UK
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15
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Hussain T, Mathur S, Peel SA, Valverde I, Bilska K, Henningsson M, Botnar RM, Simpson J, Greil GF. Coronary artery size and origin imaging in children: a comparative study of MRI and trans-thoracic echocardiography. BMC Med Imaging 2015; 15:48. [PMID: 26502883 PMCID: PMC4623280 DOI: 10.1186/s12880-015-0095-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Accepted: 10/22/2015] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND The purpose of this study was to see how coronary magnetic resonance angiography (CMRA) compared to echocardiography for the detection of coronary artery origins and to compare CMRA measurements for coronary dimensions in children with published echocardiographic reference values. METHODS Enrolled patients underwent dual cardiac phase CMRA and echocardiography under the same anesthetic. Echocardiographic measurements of the right coronary artery (RCA), left anterior descending (LAD) and left main (LM) were made. CMRA dimensions were assessed manually at the same points as the echocardiographic measurements. The number of proximal LAD branches imaged was also recorded in order to give an estimate of distal coronary tree visualization. RESULTS Fifty patients (24 boys, mean age 4.0 years (range 18 days to 18 years)) underwent dual-phase CMRA. Coronary origins were identified in 47/50 cases for CMRA (remaining 3 were infants aged 3, 9 and 11 months). In comparison, origins were identified in 41/50 cases for echo (remaining were all older children). CMRA performed better than echocardiography in terms of distal visualization of the coronary tree (median 1 LAD branch vs. median 0; p = 0.001). Bland-Altman plots show poor agreement between echocardiography and CMRA for coronary measurements. CMRA measurements did vary according to cardiac phase (systolic mean 1.90, s.d. 0.05 mm vs. diastolic mean 1.84, s.d. 0.05 mm; p = 0.002). CONCLUSIONS Dual-phase CMRA has an excellent (94 %) success rate for the detection of coronary origins in children. Newborn infants remain challenging and echocardiography remains the accepted imaging modality for this age group. Echocardiographic reference ranges are not applicable to CMRA measurements as agreement was poor between modalities. Future coronary reference values, using any imaging modality, should quote the phase in which it was measured.
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Affiliation(s)
- Tarique Hussain
- Division of Imaging Sciences, King's College London, NIHR Biomedical Research Centre at Guy's & St Thomas' NHS Foundation Trust, London, UK. .,Department of Paediatric Cardiology, Evelina London Children's Hospital, Guy's & St Thomas' NHS Foundation Trust, Westminster Bridge Road, London, UK. .,Department of Pediatrics, UT Southwestern Medical Center, Children's Medical Center, 1935 Medical District Drive, Dallas, TX, USA.
| | - Sujeev Mathur
- Department of Paediatric Cardiology, Evelina London Children's Hospital, Guy's & St Thomas' NHS Foundation Trust, Westminster Bridge Road, London, UK.
| | - Sarah A Peel
- Division of Imaging Sciences, King's College London, NIHR Biomedical Research Centre at Guy's & St Thomas' NHS Foundation Trust, London, UK. .,Department of Paediatric Cardiology, Evelina London Children's Hospital, Guy's & St Thomas' NHS Foundation Trust, Westminster Bridge Road, London, UK.
| | - Israel Valverde
- Division of Imaging Sciences, King's College London, NIHR Biomedical Research Centre at Guy's & St Thomas' NHS Foundation Trust, London, UK. .,Department of Paediatric Cardiology, Evelina London Children's Hospital, Guy's & St Thomas' NHS Foundation Trust, Westminster Bridge Road, London, UK.
| | - Karolina Bilska
- Department of Paediatric Cardiology, Evelina London Children's Hospital, Guy's & St Thomas' NHS Foundation Trust, Westminster Bridge Road, London, UK.
| | - Markus Henningsson
- Division of Imaging Sciences, King's College London, NIHR Biomedical Research Centre at Guy's & St Thomas' NHS Foundation Trust, London, UK.
| | - Rene M Botnar
- Division of Imaging Sciences, King's College London, NIHR Biomedical Research Centre at Guy's & St Thomas' NHS Foundation Trust, London, UK.
| | - John Simpson
- Division of Imaging Sciences, King's College London, NIHR Biomedical Research Centre at Guy's & St Thomas' NHS Foundation Trust, London, UK. .,Department of Paediatric Cardiology, Evelina London Children's Hospital, Guy's & St Thomas' NHS Foundation Trust, Westminster Bridge Road, London, UK.
| | - Gerald F Greil
- Division of Imaging Sciences, King's College London, NIHR Biomedical Research Centre at Guy's & St Thomas' NHS Foundation Trust, London, UK. .,Department of Paediatric Cardiology, Evelina London Children's Hospital, Guy's & St Thomas' NHS Foundation Trust, Westminster Bridge Road, London, UK. .,Department of Pediatrics, UT Southwestern Medical Center, Children's Medical Center, 1935 Medical District Drive, Dallas, TX, USA.
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16
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Single breath hold 3D cardiac cine MRI using kat-ARC: preliminary results at 1.5T. Int J Cardiovasc Imaging 2015; 31:851-7. [DOI: 10.1007/s10554-015-0615-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2014] [Accepted: 02/06/2015] [Indexed: 10/24/2022]
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17
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Coppo S, Piccini D, Bonanno G, Chaptinel J, Vincenti G, Feliciano H, van Heeswijk RB, Schwitter J, Stuber M. Free-running 4D whole-heart self-navigated golden angle MRI: Initial results. Magn Reson Med 2014; 74:1306-16. [PMID: 25376772 DOI: 10.1002/mrm.25523] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Revised: 10/01/2014] [Accepted: 10/16/2014] [Indexed: 12/22/2022]
Abstract
PURPOSE To test the hypothesis that both coronary anatomy and ventricular function can be assessed simultaneously using a single four-dimensional (4D) acquisition. METHODS A free-running 4D whole-heart self-navigated acquisition incorporating a golden angle radial trajectory was implemented and tested in vivo in nine healthy adult human subjects. Coronary magnetic resonance angiography (MRA) datasets with retrospective selection of acquisition window width and position were extracted and quantitatively compared with baseline self-navigated electrocardiography (ECG) -triggered coronary MRA. From the 4D datasets, the left-ventricular end-systolic, end-diastolic volumes (ESV & EDV) and ejection fraction (EF) were computed and compared with values obtained from conventional 2D cine images. RESULTS The 4D datasets enabled dynamic assessment of the whole heart with isotropic spatial resolution of 1.15 mm(3). Coronary artery image quality was very similar to that of the ECG-triggered baseline scan despite some SNR penalty. A good agreement between 4D and 2D cine imaging was found for EDV, ESV, and EF. CONCLUSION The hypothesis that both coronary anatomy and ventricular function can be assessed simultaneously in vivo has been tested positive. Retrospective and flexible acquisition window selection allows to best visualize each coronary segment at its individual time point of quiescence.
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Affiliation(s)
- Simone Coppo
- Center for Biomedical Imaging (CIBM), Lausanne, Switzerland.,Department of Radiology, University Hospital (CHUV) and University of Lausanne (UNIL), Lausanne, Switzerland
| | - Davide Piccini
- Center for Biomedical Imaging (CIBM), Lausanne, Switzerland.,Department of Radiology, University Hospital (CHUV) and University of Lausanne (UNIL), Lausanne, Switzerland.,Advanced Clinical Imaging Technology, Siemens Healthcare IM BM PI, Lausanne, Switzerland
| | - Gabriele Bonanno
- Center for Biomedical Imaging (CIBM), Lausanne, Switzerland.,Department of Radiology, University Hospital (CHUV) and University of Lausanne (UNIL), Lausanne, Switzerland
| | - Jérôme Chaptinel
- Center for Biomedical Imaging (CIBM), Lausanne, Switzerland.,Department of Radiology, University Hospital (CHUV) and University of Lausanne (UNIL), Lausanne, Switzerland
| | - Gabriella Vincenti
- Department of Cardiology, University Hospital (CHUV) and University of Lausanne (UNIL), Lausanne, Switzerland
| | - Hélène Feliciano
- Center for Biomedical Imaging (CIBM), Lausanne, Switzerland.,Department of Radiology, University Hospital (CHUV) and University of Lausanne (UNIL), Lausanne, Switzerland
| | - Ruud B van Heeswijk
- Center for Biomedical Imaging (CIBM), Lausanne, Switzerland.,Department of Radiology, University Hospital (CHUV) and University of Lausanne (UNIL), Lausanne, Switzerland
| | - Juerg Schwitter
- Department of Cardiology, University Hospital (CHUV) and University of Lausanne (UNIL), Lausanne, Switzerland
| | - Matthias Stuber
- Center for Biomedical Imaging (CIBM), Lausanne, Switzerland.,Department of Radiology, University Hospital (CHUV) and University of Lausanne (UNIL), Lausanne, Switzerland
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18
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Barkauskas KJ, Rajiah P, Ashwath R, Hamilton JI, Chen Y, Ma D, Wright KL, Gulani V, Griswold MA, Seiberlich N. Quantification of left ventricular functional parameter values using 3D spiral bSSFP and through-time non-Cartesian GRAPPA. J Cardiovasc Magn Reson 2014; 16:65. [PMID: 25231607 PMCID: PMC4160541 DOI: 10.1186/s12968-014-0065-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2014] [Accepted: 08/11/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The standard clinical acquisition for left ventricular functional parameter analysis with cardiovascular magnetic resonance (CMR) uses a multi-breathhold multi-slice segmented balanced SSFP sequence. Performing multiple long breathholds in quick succession for ventricular coverage in the short-axis orientation can lead to fatigue and is challenging in patients with severe cardiac or respiratory disorders. This study combines the encoding efficiency of a six-fold undersampled 3D stack of spirals balanced SSFP sequence with 3D through-time spiral GRAPPA parallel imaging reconstruction. This 3D spiral method requires only one breathhold to collect the dynamic data. METHODS Ten healthy volunteers were recruited for imaging at 3 T. The 3D spiral technique was compared against 2D imaging in terms of systolic left ventricular functional parameter values (Bland-Altman plots), total scan time (Welch's t-test) and qualitative image rating scores (Wilcoxon signed-rank test). RESULTS Systolic left ventricular functional values were not significantly different (i.e. 3D-2D) between the methods. The 95% confidence interval for ejection fraction was -0.1 ± 1.6% (mean ± 1.96*SD). The total scan time for the 3D spiral technique was 48 s, which included one breathhold with an average duration of 14 s for the dynamic scan, plus 34 s to collect the calibration data under free-breathing conditions. The 2D method required an average of 5 min 40s for the same coverage of the left ventricle. The difference between 3D and 2D image rating scores was significantly different from zero (Wilcoxon signed-rank test, p < 0.05); however, the scores were at least 3 (i.e. average) or higher for 3D spiral imaging. CONCLUSION The 3D through-time spiral GRAPPA method demonstrated equivalent systolic left ventricular functional parameter values, required significantly less total scan time and yielded acceptable image quality with respect to the 2D segmented multi-breathhold standard in this study. Moreover, the 3D spiral technique used just one breathhold for dynamic imaging, which is anticipated to reduce patient fatigue as part of the complete cardiac examination in future studies that include patients.
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Affiliation(s)
| | - Prabhakar Rajiah
- />Cardiothoracic Imaging, Department of Radiology, University Hospitals Case Medical Center, Cleveland, Ohio USA
| | - Ravi Ashwath
- />Pediatric Cardiology, Rainbow Babies and Children’s Hospital, University Hospitals Case Medical Center, Cleveland, Ohio USA
| | - Jesse I Hamilton
- />Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio USA
| | - Yong Chen
- />Radiology, University Hospitals Case Medical Center, Cleveland, Ohio USA
| | - Dan Ma
- />Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio USA
| | - Katherine L Wright
- />Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio USA
| | - Vikas Gulani
- />Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio USA
- />Radiology, University Hospitals Case Medical Center, Cleveland, Ohio USA
| | - Mark A Griswold
- />Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio USA
- />Radiology, University Hospitals Case Medical Center, Cleveland, Ohio USA
| | - Nicole Seiberlich
- />Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio USA
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19
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Delgado JA, Abad P, Rascovsky S, Calvo V, Castrillon G, Greil G, Uribe S. Assessment of cardiac volumes using an isotropic whole-heart dual cardiac phase sequence in pediatric patients. J Magn Reson Imaging 2013; 39:708-16. [PMID: 23723135 DOI: 10.1002/jmri.24203] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2012] [Accepted: 04/12/2013] [Indexed: 11/11/2022] Open
Abstract
PURPOSE To evaluate the accuracy of a three-dimensional dual phase (3D DP) whole-heart technique for cardiac volumetric assessment in pediatric patients with cardiac abnormalities. MATERIALS AND METHODS The institutional approved this study, and informed consent was obtained from patients or their guardians. This prospective study involved 31 pediatric patients (mean age, 7.9 years; range, 15 days to 15 years) for the assessment of cardiac abnormalities using cardiovascular MR. A standard protocol was performed for assessing cardiac anatomy and function. For evaluating the 3D DP technique, statistical comparison with a 2D cine multi-slice technique (2D steady-state free-precession [SSFP]) was performed using linear regression, intraclass correlation coefficient, and Bland Altman plots. RESULTS Left (LV) and right (RV) ventricular cardiac volumes obtained with the 3D DP technique were in strong agreement with those obtained with the 2D SSFP technique for small and large ventricular volumes. The intraclass correlation coefficients (ICC) between both techniques were 0.992 for the LV end-diastolic volume (EDV), 0.983 for the LV end-systolic volume (ESV), 0.952 for the LV-systolic volume (SV), 0.992 for the RV-EDV, 0.992 for the RV-ESV, 0.928 for the RV-SV. Interobserver analysis indicated good reproducibility for both the 2D SSFP and the 3D DP techniques. CONCLUSION The 3D DP technique provides as accurate cardiac volumes as the 2D SSFP technique in the pediatric population, but with the added benefits of easier data acquisition and detailed anatomical information of the whole heart and great vessels in a single free-breathing scan.
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Affiliation(s)
- Jorge A Delgado
- Fundación Instituto de Alta Tecnología Medica, Medellin, Colombia
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20
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Zuluaga MA, Cardoso MJ, Modat M, Ourselin S. Multi-atlas Propagation Whole Heart Segmentation from MRI and CTA Using a Local Normalised Correlation Coefficient Criterion. FUNCTIONAL IMAGING AND MODELING OF THE HEART 2013. [DOI: 10.1007/978-3-642-38899-6_21] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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21
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Makowski MR, Wiethoff AJ, Jansen CHP, Uribe S, Parish V, Schuster A, Botnar RM, Bell A, Kiesewetter C, Razavi R, Schaeffter T, Greil GF. Single breath-hold assessment of cardiac function using an accelerated 3D single breath-hold acquisition technique--comparison of an intravascular and extravascular contrast agent. J Cardiovasc Magn Reson 2012; 14:53. [PMID: 22849703 PMCID: PMC3438073 DOI: 10.1186/1532-429x-14-53] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2012] [Accepted: 07/10/2012] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND Cardiovascular magnetic resonance (CMR) is the current gold standard for the assessment of left ventricular (LV) function. Repeated breath-holds are needed for standard multi-slice 2D cine steady-state free precession sequences (M2D-SSFP). Accelerated single breath-hold techniques suffer from low contrast between blood pool and myocardium. In this study an intravascular contrast agent was prospectively compared to an extravascular contrast agent for the assessment of LV function using a single-breath-hold 3D-whole-heart cine SSFP sequence (3D-SSFP). METHODS LV function was assessed in fourteen patients on a 1.5 T MR-scanner (Philips Healthcare) using 32-channel coil technology. Patients were investigated twice using a 3D-SSFP sequence (acquisition time 18-25 s) after Gadopentetate dimeglumine (GdD, day 1) and Gadofosveset trisodium (GdT, day 2) administration. Image acquisition was accelerated using sensitivity encoding in both phase encoding directions (4xSENSE). CNR and BMC were both measured between blood and myocardium. The CNR incorporated noise measurements, while the BMC represented the coeffiancy between the signal from blood and myocardium [1]. Contrast to noise ratio (CNR), blood to myocardium contrast (BMC), image quality, LV functional parameters and intra-/interobserver variability were compared. A M2D-SSFP sequence was used as a reference standard on both days. RESULTS All 3D-SSFP sequences were successfully acquired within one breath-hold after GdD and GdT administration. CNR and BMC were significantly (p < 0.05) higher using GdT compared to GdD, resulting in an improved endocardial definition. Using 3D-SSFP with GdT, Bland-Altman plots showed a smaller bias (95% confidence interval LVEF: 9.0 vs. 23.7) and regression analysis showed a stronger correlation to the reference standard (R2 = 0.92 vs. R2 = 0.71), compared to 3D-SSFP with GdD. CONCLUSIONS A single-breath-hold 3D-whole-heart cine SSFP sequence in combination with 32-channel technology and an intravascular contrast agent allows for the accurate and fast assessment of LV function.
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Affiliation(s)
- Marcus R Makowski
- King’s College London BHF Centre, Division of Imaging Science, Biomedical Research Centre of Guy’s and St. Thomas’ NHS Foundation Trust, London, UK
- Department of Radiology, Charite, Berlin, Germany
| | - Andrea J Wiethoff
- King’s College London BHF Centre, Division of Imaging Science, Biomedical Research Centre of Guy’s and St. Thomas’ NHS Foundation Trust, London, UK
- Philips Healthcare, Guildford, UK
| | - Christian HP Jansen
- King’s College London BHF Centre, Division of Imaging Science, Biomedical Research Centre of Guy’s and St. Thomas’ NHS Foundation Trust, London, UK
| | - Sergio Uribe
- King’s College London BHF Centre, Division of Imaging Science, Biomedical Research Centre of Guy’s and St. Thomas’ NHS Foundation Trust, London, UK
- Radiology Department and Biomedical Imaging Center, School of Medicine, Pontifica Universidad Catolica de Chile
| | - Victoria Parish
- King’s College London BHF Centre, Division of Imaging Science, Biomedical Research Centre of Guy’s and St. Thomas’ NHS Foundation Trust, London, UK
| | - Andreas Schuster
- King’s College London BHF Centre, Division of Imaging Science, Biomedical Research Centre of Guy’s and St. Thomas’ NHS Foundation Trust, London, UK
| | - Rene M Botnar
- King’s College London BHF Centre, Division of Imaging Science, Biomedical Research Centre of Guy’s and St. Thomas’ NHS Foundation Trust, London, UK
| | - Aaron Bell
- King’s College London BHF Centre, Division of Imaging Science, Biomedical Research Centre of Guy’s and St. Thomas’ NHS Foundation Trust, London, UK
| | - Christoph Kiesewetter
- King’s College London BHF Centre, Division of Imaging Science, Biomedical Research Centre of Guy’s and St. Thomas’ NHS Foundation Trust, London, UK
| | - Reza Razavi
- King’s College London BHF Centre, Division of Imaging Science, Biomedical Research Centre of Guy’s and St. Thomas’ NHS Foundation Trust, London, UK
| | - Tobias Schaeffter
- King’s College London BHF Centre, Division of Imaging Science, Biomedical Research Centre of Guy’s and St. Thomas’ NHS Foundation Trust, London, UK
| | - Gerald F Greil
- King’s College London BHF Centre, Division of Imaging Science, Biomedical Research Centre of Guy’s and St. Thomas’ NHS Foundation Trust, London, UK
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22
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Hussain T, Lossnitzer D, Bellsham-Revell H, Valverde I, Beerbaum P, Razavi R, Bell AJ, Schaeffter T, Botnar RM, Uribe SA, Greil GF. Three-dimensional Dual-Phase Whole-Heart MR Imaging: Clinical Implications for Congenital Heart Disease. Radiology 2012; 263:547-54. [DOI: 10.1148/radiol.12111700] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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23
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van Pelt R, Bescós JO, Breeuwer M, Clough RE, Gröller ME, Romenij BTH, Vilanova A. Interactive virtual probing of 4D MRI blood-flow. IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS 2011; 17:2153-2162. [PMID: 22034334 DOI: 10.1109/tvcg.2011.215] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Better understanding of hemodynamics conceivably leads to improved diagnosis and prognosis of cardiovascular diseases. Therefore, an elaborate analysis of the blood-flow in heart and thoracic arteries is essential. Contemporary MRI techniques enable acquisition of quantitative time-resolved flow information, resulting in 4D velocity fields that capture the blood-flow behavior. Visual exploration of these fields provides comprehensive insight into the unsteady blood-flow behavior, and precedes a quantitative analysis of additional blood-flow parameters. The complete inspection requires accurate segmentation of anatomical structures, encompassing a time-consuming and hard-to-automate process, especially for malformed morphologies. We present a way to avoid the laborious segmentation process in case of qualitative inspection, by introducing an interactive virtual probe. This probe is positioned semi-automatically within the blood-flow field, and serves as a navigational object for visual exploration. The difficult task of determining position and orientation along the view-direction is automated by a fitting approach, aligning the probe with the orientations of the velocity field. The aligned probe provides an interactive seeding basis for various flow visualization approaches. We demonstrate illustration-inspired particles, integral lines and integral surfaces, conveying distinct characteristics of the unsteady blood-flow. Lastly, we present the results of an evaluation with domain experts, valuing the practical use of our probe and flow visualization techniques.
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Affiliation(s)
- Roy van Pelt
- Department of Biomedical Engineering, within the group of Biomedical Image Analysis, Eindhoven University of Technology.
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24
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van Pelt R, Nguyen H, ter Haar Romeny B, Vilanova A. Automated segmentation of blood-flow regions in large thoracic arteries using 3D-cine PC-MRI measurements. Int J Comput Assist Radiol Surg 2011; 7:217-24. [PMID: 21779767 DOI: 10.1007/s11548-011-0642-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2011] [Accepted: 06/30/2011] [Indexed: 11/25/2022]
Abstract
PURPOSE Quantitative analysis of vascular blood flow, acquired by phase-contrast MRI, requires accurate segmentation of the vessel lumen. In clinical practice, 2D-cine velocity-encoded slices are inspected, and the lumen is segmented manually. However, segmentation of time-resolved volumetric blood-flow measurements is a tedious and time-consuming task requiring automation. METHODS Automated segmentation of large thoracic arteries, based solely on the 3D-cine phase-contrast MRI (PC-MRI) blood-flow data, was done. An active surface model, which is fast and topologically stable, was used. The active surface model requires an initial surface, approximating the desired segmentation. A method to generate this surface was developed based on a voxel-wise temporal maximum of blood-flow velocities. The active surface model balances forces, based on the surface structure and image features derived from the blood-flow data. The segmentation results were validated using volunteer studies, including time-resolved 3D and 2D blood-flow data. The segmented surface was intersected with a velocity-encoded PC-MRI slice, resulting in a cross-sectional contour of the lumen. These cross-sections were compared to reference contours that were manually delineated on high-resolution 2D-cine slices. RESULTS The automated approach closely approximates the manual blood-flow segmentations, with error distances on the order of the voxel size. The initial surface provides a close approximation of the desired luminal geometry. This improves the convergence time of the active surface and facilitates parametrization. CONCLUSIONS An active surface approach for vessel lumen segmentation was developed, suitable for quantitative analysis of 3D-cine PC-MRI blood-flow data. As opposed to prior thresholding and level-set approaches, the active surface model is topologically stable. A method to generate an initial approximate surface was developed, and various features that influence the segmentation model were evaluated. The active surface segmentation results were shown to closely approximate manual segmentations.
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Affiliation(s)
- Roy van Pelt
- Eindhoven University of Technology, Den Dolech 2, 5612 AZ, Eindhoven, The Netherlands.
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25
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Uribe S, Hussain T, Valverde I, Tejos C, Irarrazaval P, Fava M, Beerbaum P, Botnar RM, Razavi R, Schaeffter T, Greil GF. Congenital heart disease in children: coronary MR angiography during systole and diastole with dual cardiac phase whole-heart imaging. Radiology 2011; 260:232-40. [PMID: 21493790 DOI: 10.1148/radiol.11101659] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
PURPOSE To assess the optimal timing for coronary magnetic resonance (MR) angiography in children with congenital heart disease by using dual cardiac phase whole-heart MR imaging. MATERIALS AND METHODS The local institutional review board approved this study, and informed consent was obtained from parents or guardians. Thirty children (13 girls; overall mean age, 5.01 years) were examined with a 1.5-T MR system. A free-breathing three-dimensional steady-state free precession dual cardiac phase sequence was used to obtain MR angiographic data during end-systolic and middiastolic rest periods. Vessel length, diameter, and sharpness, as well as image quality of the coronary artery segments, were analyzed and compared by using Bland-Altman plots, linear regression analysis, the t test, and Wilcoxon signed rank tests. RESULTS Optimal coronary artery imaging timing was patient dependent and different for each coronary artery segment (36 segments favored end systole, 28 favored middiastole). In 15 patients (50%), different segments favored different cardiac phases within the same patient. Image quality and vessel sharpness degraded with higher heart rates, with a similar correlation for end systole (right coronary artery [RCA], 0.39; left main [LM] coronary artery, 0.46; left anterior descending [LAD] artery, 0.51; and left circumflex [LCX] artery, 0.50) and middiastole (RCA, 0.34; LM, 0.45; LAD, 0.48; and LCx, 0.55). Mean image quality difference or mean vessel sharpness difference showed no indication to prefer a specific cardiac phase. CONCLUSION The optimal cardiac rest period for coronary MR angiography in children with congenital heart disease is specific for each coronary artery segment. Dual cardiac phase whole-heart coronary MR angiography enables optimal coronary artery visualization by retrospectively choosing the optimal imaging rest period.
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Affiliation(s)
- Sergio Uribe
- Department of Radiology, Pontificia Universidad Católica de Chile, Marcoleta 367, Santiago 8330024, Chile.
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26
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Maffei E, Messalli G, Martini C, Rossi A, van Pelt N, van Geuns RJ, Weustink AC, Mollet NR, Nieman K, Aldrovandi A, Imbriaco M, Bogaert J, Cademartiri F. Magnetic resonance assessment of left ventricular volumes and mass using a single-breath-hold 3D k-t BLAST cine b-SSFP in comparison with multiple-breath-hold 2D cine b-SSFP. Insights Imaging 2011; 2:39-45. [PMID: 22865424 PMCID: PMC3288975 DOI: 10.1007/s13244-010-0056-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2010] [Revised: 10/07/2010] [Accepted: 11/25/2010] [Indexed: 11/15/2022] Open
Abstract
Objective To assess the feasibility of single-breath-hold three-dimensional cine b-SSFP (balanced steady-state free precession gradient echo) sequence (3D-cine), accelerated with k-t BLAST (broad-use linear acquisition speed-up technique), compared with multiple-breath-hold 2D cine b-SSFP (2D-cine) sequence for assessment of left ventricular (LV) function. Methods Imaging was performed using 1.5-T MRI (Achieva, Philips, The Netherlands) in 46 patients with different cardiac diseases. Global functional parameters, LV mass, imaging time and reporting time were evaluated and compared in each patient. Results Functional parameters and mass were significantly different in the two sequences [3D end-diastolic volume (EDV) = 129 ± 44 ml vs 2D EDV = 134 ± 49 ml; 3D end-systolic volume (ESV) = 77 ± 44 ml vs 2D ESV = 73 ± 50 ml; 3D ejection fraction (EF) = 43 ± 15% vs 2D EF = 48 ± 15%; p < 0.05], although an excellent correlation was found for LV EF (r = 0.99). Bland-Altman analysis showed small confidence intervals with no interactions on volumes (EF limits of agreement = 2.7; 7.6; mean bias 5%). Imaging time was significantly lower for 3D-cine sequence (18 ± 1 s vs 95 ± 23 s; p < 0.05), although reporting time was significantly longer for the 3D-cine sequence (29 ± 7 min vs 8 ± 3 min; p < 0.05). Conclusions A 3D-cine sequence can be advocated as an alternative to 2D-cine sequence for LV EF assessment in patients for whom shorter imaging time is desirable.
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Affiliation(s)
- Erica Maffei
- Department of Radiology and Cardiology, University Hospital, Parma, Italy
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27
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Zhuang X, Rhode KS, Razavi RS, Hawkes DJ, Ourselin S. A registration-based propagation framework for automatic whole heart segmentation of cardiac MRI. IEEE TRANSACTIONS ON MEDICAL IMAGING 2010; 29:1612-25. [PMID: 20378466 DOI: 10.1109/tmi.2010.2047112] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Magnetic resonance (MR) imaging has become a routine modality for the determination of patient cardiac morphology. The extraction of this information can be important for the development of new clinical applications as well as the planning and guidance of cardiac interventional procedures. To avoid inter- and intra-observer variability of manual delineation, it is highly desirable to develop an automatic technique for whole heart segmentation of cardiac magnetic resonance images. However, automating this process is complicated by the limited quality of acquired images and large shape variation of the heart between subjects. In this paper, we propose a fully automatic whole heart segmentation framework based on two new image registration algorithms: the locally affine registration method (LARM) and the free-form deformations with adaptive control point status (ACPS FFDs). LARM provides the correspondence of anatomical substructures such as the four chambers and great vessels of the heart, while the registration using ACPS FFDs refines the local details using a constrained optimization scheme. We validated our proposed segmentation framework on 37 cardiac MR volumes on the end-diastolic phase, displaying a wide diversity of morphology and pathology, and achieved a mean accuracy of 2.14 +/- 0.63 mm (rms surface distance) and a maximal error of 4.31 mm.
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Affiliation(s)
- Xiahai Zhuang
- Centre for Medical Image Computing, Medical Physics and Bioengineering Department, University College London, WC1E 6BT London, U.K.
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28
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Leong DP, De Pasquale CG, Selvanayagam JB. Heart failure with normal ejection fraction: the complementary roles of echocardiography and CMR imaging. JACC Cardiovasc Imaging 2010; 3:409-20. [PMID: 20394903 DOI: 10.1016/j.jcmg.2009.12.011] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2009] [Revised: 12/15/2009] [Accepted: 12/15/2009] [Indexed: 10/19/2022]
Abstract
Heart failure with normal ejection fraction (HFNEF), previously referred to as diastolic heart failure, has increased in prevalence as a cause of heart failure, now accounting for up to 50% of all cases. Contrary to initial evidence, the prognostic outlook in HFNEF may be similar to that of heart failure with reduced ejection fraction. According to current consensus statements, the diagnosis of HFNEF requires the demonstration of relatively preserved systolic left ventricular function and evidence of diastolic dysfunction. Noninvasive imaging techniques now permit evaluation of these parameters without need for cardiac catheterization in the large majority of patients. Echocardiography is the modality of choice in the evaluation of diastolic function but suffers from limitations in its assessment of systolic function. Cardiac magnetic resonance (CMR) imaging is the gold standard in the volumetric quantification of systolic function; however, it has limitations in its ability to characterize diastolic function. This report aims to review the strengths and weaknesses of both imaging modalities in the diagnosis of HFNEF. With regards to echocardiography, it will specifically describe limitations in measuring left ventricular ejection fraction, describe novel techniques to assess systolic function such as tissue velocity and strain analysis, and will review the measurements used in the evaluation of diastolic function. With respect to CMR, this review will highlight its value in the assessment of systolic left ventricular function, will review ancillary CMR findings that may support the diagnosis of HFNEF such as tissue characterization, and will provide a brief overview of CMR techniques to assess diastolic function. We propose that these 2 modalities may play a complementary role in the diagnosis of HFNEF. The importance of imaging in the diagnosis of HFNEF extends to both the individual patient and to clinical trials of therapies for this condition.
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Schmidt JF, Buehrer M, Boesiger P, Kozerke S. Highly efficient respiratory gating in coronary MR employing non-rigid retrospective motion correction. J Cardiovasc Magn Reson 2010. [DOI: 10.1186/1532-429x-12-s1-p41] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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