Modified active contour model and Random Walk approach for left ventricular cardiac MR image segmentation
Sarada Prasad Dakua, Jyotindra Singh Sahambi · International Journal for Numerical Methods in Biomedical Engineering · 2011
Abstract There is an increased rate of inconsistency in discriminating objects in cardiac magnetic resonance images with increasing disease varieties. This correspondence suggests a combination of two methods to segment the left ventricle in such images. The importance of the weighting function used in Random Walk approach is analyzed. Difference of Laplacian of Gaussian is demonstrated to be efficacious as the desired weighting function in extracting the blood pool boundary. Subsequently, the epicardial wall is sectioned out using an active contour model that considers the blood pool boundary as its initial contour to grow. Finally in order to validate the analysis, the algorithm is tested by comparing these determined borders with the ground truth images. Copyright © 2011 John Wiley & Sons, Ltd.