Abstract This paper describes the evolution of vapour bubbles and its effect on nonlinear ultrasound propagation and temperature rise through tissues for therapeutic ultrasound. An acoustic-thermo coupling algorithm incorporating nonlinearity, diffraction, and temperature-dependent tissue properties, is employed to describe nonlinear ultrasound propagation and thermal effect. Results demonstrate that an obvious migration of peak pressure toward transducer surface is observed while the position of peak temperature changes little in liver tissue before the generation of vapour bubbles, and that the boiling region enlarges towards the surface of transducer in axial direction but increases slowly in radial direction after the generation of vapour bubbles.
Received: 25 December 2007
Revised: 14 February 2008
Accepted manuscript online:
Fund: Project supported by Program for
New Century Excellent Talents in University of China (06-0450) and
National Natural Science Foundation of China (Grant No 10474044).
Cite this article:
Fan Ting-Bo(范庭波), Zhang Dong(章东), Zhang Zhe(张喆), Ma Yong(马勇), and Gong Xiu-Fen(龚秀芬) Effects of vapour bubbles on acoustic and temperature distributions of therapeutic ultrasound 2008 Chin. Phys. B 17 3372
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