抄録
A cineangiocardiography for the left ventricle is highly helpful in examining the cardiac function. Quantitative information, such for example, as the volume change and wall motion of the left ventricle in the cardiac cycle, are unobtainable without detecting boundaries of the left ventricle on the consecutive frames of a cineangiocardiogram.
This paper deals with a heuristic method to detect the boundary of the left ventricle automatically and methods of displaying various cardiac functions with the aid of a minicomputer system.
Boundaries are detected from 80 to 120 consecutive frames of the cineangiocardiogram. In detecting a specific boundary, the boundary of the preceding frame is used to obtain overall information. This makes a stable detection possible.
By using the detected boundaries of the left ventricle, quantitative information various kinds on the cardiac function are obtained. The volume change, the wall motion, the %-shortening and so on, are calculated and displayed on the graphic display. Moreover, the motion of the boundary of the left ventricle is displayed on a CRT as a moving picture.
With the use of the system described in this paper, we can grasp the movement of the left ventricle exactly and the cardiac function quantitatively.
