Propagation of Shear Waves Generated by Acoustic Radiation Force in Nondissipative Inhomogeneous Media

被引：3

作者：

Lu Ming-Zhu ^{[1
]}

Liu Xue-Jin ^{[1
]}

Shi Yu ^{[1
]}

Kang Yan-Ni ^{[1
]}

Guan Yu-Bo ^{[1
]}

Wan Ming-Xi ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Key Lab Biomed Informat Engn, Dept Biomed Engn, Sch Life Sci & Technol,Minist Educ, Xian 710049, Peoples R China

来源：

CHINESE PHYSICS LETTERS | 2012年 / 29卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Finite difference time domain method - Shear flow - Acoustic wave propagation;

D O I：

10.1088/0256-307X/29/1/014301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We concentrate on the nondissipative mechanism induced shear wave in inhomogenous tissue. The shear wave equation of radiation force in inhomogeneous media is solved numerically with a finite-difference time-domain method. A rarely studied nondissipative mechanism of shear displacement due to a smooth medium inhomogeneity is evaluated. It is noted that unlike the dissipative effect, the nondissipative action on a localized inhomogeneity with its hardness parameter changing smoothly along the beam axis, compresses or stretches the focus area. The shear waves in nondissipative inhomogeneous media remain the property of sharp turn with 100% peak positive displacement and 64% peak negative displacement. This action is useful in discerning the water-like lesion.

引用

页数：4

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