The Ultrasono-tomography for the Heart and Great Vessels in Living Human Subjects by Means of the Ultrasonic Reflection Technique

Abstract

Ultrasono-to mo grams of the heart and great vessels in living human subjects were obtained by the application of a concave transducer in the ultrasonic reflection technique with the introduction of Compound or PPI [Plea Position Indication] Sector scanning in the proximity immersed method, of all which were controlled in synchronization with ecg [electrocardiographic] current. From the tomogram thus obtained, the anatomical situation of the heart and great vessels, the intra-cardiac structures, the size of the cardiac chambers and the thickness of the cardiac and vascular walls were able to be measured in an instantaneous static state. Then the functional changes of the various cardiac structures were indicated in dynamic state by combination with the Time-Position-Indication method. The displacement and velocity of the cardiac structures during pulsation were able to be measured also. Since these methods are non-operative, they are free from major discomfort for the patient and can be repeated frequently for control purposes. This method is useful for clinical diagnostic purposes in cardiovascular diseases.