Studying features characterizing signatures of medical contours of the left ventricle on ultrasound images

Abstract

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 contour base has been identified. The resulting signature was approximated by three second- and third-degree polynomials, i.e., the left side, the right side, and the vertex. The result of this approximation was qualitatively and quantitatively better than that of the entire curve.