S29. In Vitro Dependence of Chemical and Biological Effects of Low-Intensity pulsed Ultrasound on Pulse Repetition Frequency(Oral Presentation)

Abstract

The study was performed in order to examine the chemical and biological effects induced by pulsed low intensity ultrasound using a 1 MHz generator with 50% duty factor and pulse repetition frequency (PRF) range from 0.5 to 100 Hz in vitro. The study shows that changing PRF in this range changed the acoustic environment resulting in a domination of "ultrasound streaming" (convection) or standing waves. Thus the work compares between the two factors and their roles in determining the biological and chemical effects.