Shear properties of mammalian tissues at low megahertz frequencies.

*The authors acknowledge gratefully the partial support of this study by a grant from the Institute of General Medical Science NIH and by a grant from the Bureau of Radiological Health, FDA. iF. J. Fry, F. Dunn, J, Brady, W. D. Erdman, P. Strang, R. Kohn, L Baird, and J. Cobb, "Ultrasonic Toxicity Study -of the Mouse Reproductive System and the Pregnant Uterus," in Ultrasound in Medicine, edited by D. White and R. Barnes (Plenum, New York, 1976), Vol. lI, p. 533. 2Fo DUml, Po D. Edmonds, and W. J. Fry, "Absorption and Dispersion of Ultrasound in Biological Media," in Biological Engineering, editedbyH. P. Schwan (McGraw-Hill, New York, 1969), pp. 205•332. SW. G•/ttner, "Die Energieverieflung im Menschlichen Korper bei Ultraschall-Einstrahlung," Acustica 4, 547-554 (1954). 4F. DullIl, "Temperature and Amplitude Dependence of Acoustic Absorption in Tissue," J. Acoust. SOc. Am. 34, 1545-1547 (1962). SD. E. Goldman and T. F. Hueter, "Tabular Data of the Velocity and Absorption of High-Frequency Sound in Mammalian Tissue," J. Acaust. Soe. Am. 28, 35-37 {1956). 6See for example, J. E. Logan and W. A. Himwich, "Animal Tissues and Organs: Water Content," in Biology Data Book, compiled and edited by P. L. Altman and D. S. Dirtman (Federation of American Societies Experimental Biology, Bethesda, 1972), 2rid ed., Vol. I, pp. 392-398. VF. Dunn, "ultrasonic Velocity and Attenuation i Tissues and Organs," in Proceedings of Seminar on Ultrasonic Tissue Characte•zation, NBS Special Publication 453, edited by M. Linger (U.S. GPO, Washington, DC, 1976), pp. 21-28.