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A ciné ultrasonic cardiographic technique has been developed which produces cross-sectional motion picture studies of the heart using conventional ultrasonic techniques. The area under consideration is examined using a single slow sector scan which incorporates a minimum of 20 cardiac cycles and simultaneously records an electrocardiogram. This panoramic scan views the anatomic structures sequentially, and also includes the motion of the components. This record can be assembled into a series of frames, by sampling the images relative to the electrocardiogram, and photographed to produce a motion picture. Computer assembly of prints is feasible, and with refinement this technique will be rapid enough to be clinically useful.
Gramiak et al. (Sun,) studied this question.