EFFECT OF ULTRASOUND ACOUSTIC CHARACTERISTICS IN CATTLE LIVER UNDER ULTRASOUND EXPOSURE

The effects of ultrasound exposure on the living body can be divided i nto thermal and non-thermal effects. In this study, the thermal effect was considered and temperature elevation due to ultrasound exposure w as examined. First, experimental apparatus for measurement of temperat ure elevation was considered. Then, fundamental experiments to record the thermal effect of ultrasound waves on different substances were ca rried out. These included measuring the acoustic characteristics and t emperature elevation of degassed water, tissue samples and samples mad e from agar, having properties similar to those of tissues. It was cla rified on noted that the attenuation constant of tissue decreases afte r ultrasound exposure. Finally, it proposed that the viscosity of a ta rget changes according to ultrasound exposure, and the proposition was investigated experimentally.