Key points are not available for this paper at this time.
Ultrasound successfully measured the aortic arch, right pulmonary artery, and left atrium in 130 out of 138 patients. The transducer was positioned in the suprasternal notch and the ultrasonic beam directed caudad. Clinical experiments established the identity of the sources of the echoes recorded. The diameters obtained by ultrasound were compared not only with angiocardiographic measurements in the same patients, but also with independent radiographic measurements. In all cases there was close correlation between the ultrasonic and angiocardiographic mean diameters. The motion of the echoes during the cardiac cycle was also analyzed.
Barry B. Goldberg (1971) studied this question.