Room Motion Movie Display

The gamma camera is started with the subject's electrocardiogram R wave as an initial signal, and continuously captures 16 to 20 frames of the cardiac blood pool image in one cardiac cycle. A series of blood pool images of the entire cardiac cycle from the end of diastole to the end of systole and to the end of diastole can be obtained by repeatedly capturing isochronous images of hundreds of cardiac cycles and superimposing the images of the same phase respectively by the computer. When they are repeatedly and quickly projected for film display, it can be seen that the image of the heart cavity is periodically reduced and enlarged, and the shrinkage of the edge of the image is exactly the movement of the wall of the room. The edges of the ventricles at the end of diastole and the end of systole are drawn by a computer, and they can be superimposed to show the movement of the wall.