Study of a peak in cavitation activity from HIFU exposures using TA fluorescence |
| |
Authors: | Zhu Changping He Shichuan Shan Minglei Chen Jiacai |
| |
Affiliation: | State Key Laboratory of Hydrology-water Resources and Hydraulic Engineering, Department of Computer and Information Engineering, Hohai University, ChangZhou, PR China. cpzhu5126081@hhuc.edu.cn |
| |
Abstract: | Methods of measuring the sound field and focal region of a 1.05 MHz high intensity focused ultrasound (HIFU) are described in this paper. 1.05 MHz pulsed HIFU with intensity 2400 W/cm(2) with a 1:1 duty cycle ("on" phase equaled "off" phase) was used to irradiate terephthalic acid (TA). Pulse periods of 0.5 ms, 1 ms, 3.3 ms, 10 ms, 15 ms, 33 ms, 0.1s and 1s were used. The irradiation time was 2 min. To indicate the intensity of inertial cavitation activity, the fluorescence intensity of hydroxyterephthalic acid (HTA) was measured. The result shows that the cavitation activity of pulsed HIFU peaks at a pulse period of 10 ms, cavitation activity is significantly greater for pulse periods from 2 to 20 ms than for others. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|