This study was designed to measure the ultrasonic attenuation within phantoms and tissue samples over a broad bandwidth and at many angles of incidence with respect to intrinsic orientations in order to elucidate both the frequency and angular dependence of the attenuation coefficient. Significant angular dependence, or anisotropy, of the attenuation was observed in canine myocardium (maximum to minimum ratio: 2.2 to 1) and a tissue mimicking phantom of oriented graphite fibers in gelatin (max to min: 2 to 1). In control studies, insignificant anisotropy was observed in the attenuation in canine liver samples and phantoms with graphite powder suspended in gelatin. Comparisons of the magnitude of variations of the oriented‐fiber phantom to that predicted by a viscous relative motion model are presented.
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September 1990
September 01 1990
Anisotropy of the ultrasonic attenuation in soft tissues: Measurements in vitro
Jack G. Mottley;
Jack G. Mottley
College of Engineering and Applied Science, University of Rochester, Rochester, New York 14601
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James G. Miller
James G. Miller
Department of Physics, Washington University, St. Louis, Missouri 63130
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J. Acoust. Soc. Am. 88, 1203–1210 (1990)
Article history
Received:
August 04 1989
Accepted:
May 15 1990
Citation
Jack G. Mottley, James G. Miller; Anisotropy of the ultrasonic attenuation in soft tissues: Measurements in vitro. J. Acoust. Soc. Am. 1 September 1990; 88 (3): 1203–1210. https://doi.org/10.1121/1.399751
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