In:
The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 105, No. 2_Supplement ( 1999-02-01), p. 1117-1117
Abstract:
One of the advantages of ultrasound phased-array treatments is the noninvasive manner in which ultrasonic energy, and then heat, can be delivered to the treatment volume. However, the heat generated in the medium induces variations in the sound speed, which affects the acoustic focusing and leads to strong effects such as self-focusing or self-defocusing of the sound beam. In this work, a numerical simulation is used to study coupled acoustic-heat propagation in tissue. By simultaneously modeling the propagation of acoustic waves and the diffusion of heat, it was possible to simulate quantitatively acoustic refraction induced by heat in the treatment volume. Finally, using phase conjugation, one procedure to control temperature and maintain the acoustic focusing at the initially desired focal point was developed.
Type of Medium:
Online Resource
ISSN:
0001-4966
,
1520-8524
Language:
English
Publisher:
Acoustical Society of America (ASA)
Publication Date:
1999
detail.hit.zdb_id:
1461063-2
