Title :
A novel 4D PDE-based approach for accurate assessment of myocardium function using cine cardiac magnetic resonance images
Author :
Sliman, H. ; Elnakib, A. ; Beache, G.M. ; Soliman, A. ; Khalifa, F. ; Gimel´farb, G. ; Elmaghraby, A. ; El-Baz, A.
Author_Institution :
Bioeng. Dept., Univ. of Louisville, Louisville, KY, USA
Abstract :
A novel framework for assessing wall thickening from 4D cine cardiac magnetic resonance imaging (CMRI) is proposed. The proposed approach is primarily based on using geometrical features to track the left ventricle (LV) wall during the cardiac cycle. The 4D tracking approach consists of the following two main steps: (i) Initially, the surface points on the LV wall are tracked by solving a 3D Laplace equation between two successive LV surfaces; and (ii) Secondly, the locations of the tracked LV surface points are iteratively adjusted through an energy minimization cost function using a generalized Gauss-Markov random field (GGMRF) image model in order to remove inconsistencies and preserve the anatomy of the heart wall during the tracking process. Then the myocardial wall thickening is estimated by co-allocation of the corresponding points, or matches between the endocardium and epicardium surfaces of the LV wall using the solution of the 3D Laplace equation. Experimental results on in vivo data confirm the accuracy and robustness of our method. Moreover, the comparison results demonstrate that our approach outperforms 2D wall thickening estimation approaches.
Keywords :
Gaussian processes; Laplace equations; Markov processes; biomedical MRI; cardiology; feature extraction; medical image processing; 2D wall thickening estimation; 3D Laplace equation; 4D tracking approach; CMRI; accurate myocardium function assessment; cardiac cycle; cine cardiac magnetic resonance images; endocardium; energy minimization cost function; epicardium surfaces; generalized Gauss-Markov random field image model; geometrical features; heart wall anatomy; left ventricle wall; myocardial wall thickening; novel 4D PDE-based approach; surface points; tracked LV surface points; wall thickening; Biomedical imaging; Estimation; Heart; Laplace equations; Magnetic resonance imaging; Myocardium; Three-dimensional displays; Cardiac; Cine; MRI; Thickening; Thickness; Tracking;
Conference_Titel :
Image Processing (ICIP), 2014 IEEE International Conference on
Conference_Location :
Paris
DOI :
10.1109/ICIP.2014.7025718