Hiroshi INOUE², Kay I. CARNES¹, Floyd DUNN¹

¹Bioacoustics Research Laboratory, Department of Electrical and Computer Engineering, University of Illinois, ²Department of Electrical and Electronic Engineering, Mining College, Akita University

キーワード : Ultrasonic absorption, Gonads, Cancer

The transient thermoelectric method was employed to determine the ultrasonic absorption coefficient α of normal and pathological excised human ovary and testis at 1 and 3.25 MHz. At 1 MHz, α of normal ovary ranged from 0.016 for follicle to 0.046 N_p/cm for the tunica albuginea, while the studied pathologies ranged from 0.02 to 0.123 N_p/cm. The α increased from 0.018 N_p/cm for normal testis from 0.024 to 0.048 N_p/cm for the pathological organs studied. The observed changes in the absorption coefficient, of the pathologies from normal, are consistent with the attending changes in water and protein content. The frequency dependence for testis is f^1.4 and increases with the studied pathologies, while that for ovary is f^1.6 and decreases with the studied pathologies.