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Myocardial segmentation based on magnetic resonance sequences

Pieciak T.

Bio-Algorithms and Med-Systems

2010

Vol. 6, no. 12

85--90

A strain analysis is a novel diagnostics method used in the cardiology. The advanced regional quantitive analysis of the myocardium during a systole and a diastole allows to diagnose a cardiac cycle. Realization of the analysis requires a myocardial segmentation algorithm. In this paper the myocardial segmentation method from the cardiovascular magnetic resonance sequences (CMR) has been presented. The endocardium areas are calculated using active contour algorithm with the gradient vector flow forces (GVF). Apart from that, the algorithm uses fuzzy logic approach to detect the edges. As a result, the curve matches to image contents. The epicardium boundaries are being designated and supplemented by the surrounding analysis and Fourier descriptors. Based on the endocardium and the epicardium boundaries which limit the myocardium it is possible to realize analysis a local stenosis detection and the directional strain during the cardiac cycle. The analysis is based on the CMR images of the left ventricle which were acquired in short axis of left ventricle and radial direction. The most important achievements presented in this paper are fuzzy logic application in the image processing, the active contour segmentation method improvements and the formal descriptions of the myocardium boundaries.