Indication of Probe-Axis Angle by Extracting Wall Motion of Heart to Assist in Obtaining Long- and Short-Axis Views on Echocardiography
We have developed an algorithm to find standard cross sections of the heart from successive echograms. We first divided an echogram into small spatial regions to detect the typical motion of the mitral valve by analyzing the brightness variation and correlation coefficient among the regions. Furthermore, combining this technique with the optical flow method, we elucidated the region velocity of the left ventricle after centering the valve on echogram. By analyzing symmetry among specified regions, we distinguished the short-axis view of heart from the others.
Key wordsMitral valve Long-axis Short-axis Correlation coefficient Optical flow
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