Anastasia Bobkova

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The study of the mass center (CM) motion of the left ventricle (LV) area in echocardiographic videos is presented. CM of any phase of the cardiac cycle is inside an ellipse. An area of the ellipse is not more than 2% of the area of LV in systole. The criterion to identify correct and incorrect forms of contours are proposed for automatic contouring of LV in(More)
Cardiologist builds contour bounding area of the left ventricle (LV) in each frame of the ultrasound video sequence usually in a manual mode. The article describes results of application of semi-automatic algorithm using the optical flow. The visual and qualitative characteristic of contouring results of this algorithm are obtained. This algorithm is used(More)
Echocardiography is a widespread method for analysing of the heart muscle, in which a consistent set of frames with instant images of the heart are recieved. Cardiologists build a contour, which bound an area of the left ventricle for each frame, because its state gives the information to diagnose diseases of the heart muscle. Doctors have an idea about the(More)
Signatures of medical contouring of the left-ventricular (LV) regions are studied. This research is part of addressing the general problem on automatic contouring of LV regions on ultrasound frames with apical four-chamber cardiac projection. A signature is a curve of an LV contour plotted in polar coordinates. The optimal point in the center of the LV(More)
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