Title :
Nonlinear ultrasound propagation in a spherical bubble cloud
Author :
Yoshizawa, Shin ; Ikeda, Teiichiro ; Takagi, Shu ; Matsumoto, Yoichiro
Author_Institution :
Dept. of Mech. Eng., Univ. of Tokyo, Japan
Abstract :
Recently, HIFU (high intensity focused ultrasound) has attracted much attention in medical applications due to its minimal invasiveness. In HIFU applications, the high pressure amplitude in the ultrasound focal region generates acoustic cavitation. When the cavitation collapses violently, high pressure is generated and cavitation erosion is observed. In order to understand the relationship between the high pressure and nonlinear ultrasound propagation in the bubble cloud, we numerically investigate the oscillation of a bubble cloud which consists of many microbubbles.
Keywords :
biomedical ultrasonics; bubbles; cavitation; nonlinear acoustics; surgery; ultrasonic propagation; HIFU; acoustic cavitation; cavitation erosion; high intensity focused ultrasound; high pressure amplitude; medical applications; microbubbles; nonlinear ultrasound propagation; oscillation; spherical bubble cloud; ultrasound focal region; Acoustic applications; Clouds; Equations; Frequency; Mechanical engineering; Medical services; Shock waves; Temperature; Ultrasonic imaging; Viscosity;
Conference_Titel :
Ultrasonics Symposium, 2004 IEEE
Print_ISBN :
0-7803-8412-1
DOI :
10.1109/ULTSYM.2004.1417877
