Remote measurement of material properties from radiation force induced vibration of an embedded sphere

被引：71

作者：

Chen, SG ^{[1
]}

Fatemi, M ^{[1
]}

Greenleaf, JF ^{[1
]}

机构：

[1] Mayo Clin, Dept Physiol & Biophys, Basic Ultrasound Res Lab, Rochester, MN 55905 USA

来源：

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA | 2002年 / 112卷 / 03期

关键词：

D O I：

10.1121/1.1501276

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

A quantitative model is presented for a sphere vibrated by two ultrasound beams of frequency omega(1) and omega(2). Due to the interference of two sound beams, the radiation force has a dynamic component of frequency omega(2) - omega(1). The radiation impedance and mechanical impedance of the sphere are then used to compute the vibration speed of the sphere. Vibration speed versus vibration frequency is measured by laser vibrometer on several spheres, both in water and in gel phantom. These experimental results are used to verify the model. This method can be used to estimate the material properties of the medium (e.g., shear modulus) surrounding the sphere. (C) 2002 Acoustical Society of America.

引用

页码：884 / 889

页数：6

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