Focusing of high power ultrasound beams and limiting values of shock wave parameters

被引：65

作者：

Bessonova, O. V. ^{[1
]}

Khokhlova, V. A. ^{[1
,2
]}

Bailey, M. R. ^{[2
]}

Canney, M. S. ^{[2
]}

Crum, L. A. ^{[2
]}

机构：

[1] Moscow MV Lomonosov State Univ, Fac Phys, Moscow 119992, Russia

[2] Univ Washington, Appl Phys Lab, Ctr Ind & Med Ultrasound, Seattle, WA 98105 USA

来源：

ACOUSTICAL PHYSICS | 2009年 / 55卷 / 4-5期

关键词：

FINITE-AMPLITUDE DISTORTION; DIAGNOSTIC ULTRASOUND; NONLINEARITY; FIELDS;

D O I：

10.1134/S1063771009040034

中图分类号：

O42 [声学];

学科分类号：

070206 [声学];

摘要：

In this work, the influence of nonlinear and diffraction effects on amplification factors of focused ultrasound systems is investigated. The limiting values of acoustic field parameters obtained by focusing of high power ultrasound are studied. The Khokhlov-Zabolotskaya-Kuznetsov (KZK) equation was used for the numerical modeling. Solutions for the nonlinear acoustic field were obtained at output levels corresponding to both pre- and post-shock formation conditions in the focal area of the beam in a weakly dissipative medium. Numerical solutions were compared with experimental data as well as with known analytic predictions.

引用

页码：463 / 473

页数：11

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