Torsion and strain analysis of left ventricular wall at ejection period by using optical-flow

In order to get the engineering application of cardiac functions, the quantitative analysis of cardiac movement is necessary. Therefore this research is concentrated on left ventricular wall, which lasts one cardiac cycle is taken as the images. The movements of the pixel between two continuous images are visualized by optical flow calculation. The transition in micro space, displacement, topographic twist, minimum principal strain, angle of torsion, and shearing strain are calculated, and the dynamics evaluations of the myocardial wall motion are tried.