Abstract
It is commonly accepted that the temperature elevation in biological specimens resulting from ultrasonic absorption will be the same for both continuous and pulsed ultrasound fields for identical spatial-peak, temporal-average intensities. The rate of heat genera tionper unit volume is typically determined by time averaging the square of the pressure waveform divided by pc. over the pulse repetition frequency. The assumption that pulsed and continuous ultrasound fields produce the same temperature elevation for identical spatial-peak, temporal-average intensities is examined from an alternate per spective and is found to be consistent with the above usual practice.
