Year: 2006
Type: article
Abstract: Recently, the use of higher power ultrasonic equipment has been extended to not only therapy but also diagnosis because the new diagnostic imaging techniques, such as Doppler color flow imaging and harmonic imaging, require a higher ultrasound power than conventional imaging techniques. It is very important to ensure the safety of temperature rise caused by the absorption of ultrasound energy in new ultrasonic imaging systems. In this two-dimensional finite difference time domain–heat conduction equation study, the temperature rise in tissue has been simulated at a focal point radiated by a phased array focused transducer, such as like a common B-mode imagine system. The center frequency of radiated wave pulses is 2.5 MHz and I SPTA =0.72 W/cm 2 . When the sound pulse repetition frequency (PRF) is changed from 100 to 400 kHz, the temperature rise in tissue at a focal point is proportional to the PRF. The maximum temperature rise in tissue has been simulated only at 0.0004 °C at a focal point of a transducer when PRF is 400 kHz.
DOI: 10.1143/jjap.45.4693
Institution: Kanagawa University
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2058080241