Cardiac motion recovery using an incompressible B-solid model
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AbstractB-spline based deformable model is commonly used in recovering three-dimensional (3D) cardiac motion from tagged MRI due to its compact description, localized continuity and control flexibility. However, existing approaches usually ignore an important well-known fact that myocardial tissue is incompressible. In this paper, we propose to reconstruct 3D cardiac motion from tagged MRI using an incompressible B-solid model. We demonstrate that cardiac motion recovery can be achieved more with greater accuracy by considering both smoothness and incompressibility of the myocardium. Specifically, our incompressible B-solid model is formulated as a 3D tensor product of B-splines, where each piece of B-spline represents a smooth and divergence-free displacement field of myocardium with respect to radial, longitudinal and circumferential direction, respectively. We further formulate the fitting of the incompressible B-solid model as an optimization problem and solve it with a two-stage algorithm. Finally, the 3D myocardium strains are obtained from the reconstructed incompressible displacement fields and visualized in a comprehensive way. The proposed method is evaluated on both synthetic and in vivo human datasets. Comparisons with state-of-the-art methods are also conducted to validate the proposed method. Experimental results demonstrate that our method has a higher accuracy and more stable volume-preserving ability than previous methods, yielding an average displacement error of 0.21 mm and a Jacobian determinant mean of 1.029. (C) 2012 IPEM. Published by Elsevier Ltd. All rights reserved.
All Author(s) ListWu HS, Heng PA, Wong TT
Journal nameMedical Engineering and Physics
Detailed description2012.\n\nTo ORKTS: Duplicate record P129232 deleted (please refer to P136543)
Volume Number35
Issue Number7
Pages958 - 968
LanguagesEnglish-United Kingdom
KeywordsB-solid; Cardiac motion recovery; Incompressible model; Tagged MR1
Web of Science Subject CategoriesEngineering; Engineering, Biomedical; ENGINEERING, BIOMEDICAL

Last updated on 2020-17-11 at 23:46