Abstract
Within recent years, the application of pulse-echo ultrasonic devices for mapping the outline of body structures has shown great promise. One such instrument is described herein and contains a number of features that are original and that are specifically designed to make it adaptable for medical use. Among these are six types of readout, including A, B, C, counter, and two tape-writing types, enabling information to be presented in many novel forms. Among the applications that are now close to clinical use are measurement of brain centerline shift and other brain structural details, and indication of mitral-valve deficiency. Among those medical applications that are still experimental, but that show great promise, are measurement and location of arteries, location and mapping of the unborn fetus in humans, measurement and continuous monitoring of the development of the ovum in various birds, location and mapping of muscular and bone structure both at rest and in motion, investigation of dental structure, measurement of fat layer, etc. The ultrasonic pulse-echo technique has great advantages in that it is completely without danger at the powers used, it can be applied without any discomfort, and without operating on the patient, it is instantaneous, and yet can be easily adapted to permanent records, and in general the apparatus is neither expensive nor difficult to construct.
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