β Scribed by Dr. Melvin Linzer
No coin nor oath required. For personal study only.
be one of the next big developments in the clinical utilization of ultrasound, the editor thought we should bring this conference to the attention o f our readers. Therefore, he asked Dr. Me1 Linzer, who was the program director o f the conference, to write up a summary of what transpired. Except for editorial-type changes, the editorial staff o f the journal has not attempted to alter the writeup in any way.
Recent developments in ultrasonic imaging and gray scale technology have made it possible to visualize at high resolution the internal texture of tissue and relate the texture to tissue pathology. In spite of these impressive successes, however, current clinical instruments provide data on only two tissue properties, backscattered echo strength and medium attenuation, neither of which is separated experimentally. Because there are many different modes of interaction of ultrasonic energy with tissue, a vast amount of additional information is potentially available from an ultrasonic signal. This includes such basic acoustic parameters as absorption, velocity, attenuation, scattering, impedance, and their dependence on frequency and other physical variables. In principle, suitable in vivo techniques could be devised which will extract and separate many of the medically significant features of the ultrasound interactions. The development of such quantitative techniques for measurement of ultrasonic tissue parameters is From the Institute f o r Materials Research, National Bureau of Standards,
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