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第 37 卷 第 5 期 Vol. 37, No.5
2018 年 9 月 Journal of Applied Acoustics September, 2018

纪念应崇福院士诞辰100周年

大张角共焦换能器对振动声成像的影响 ∗

戚 萌 刘晓宙 † 刘杰惠 毛一葳

(南京大学声学研究所 近代声学教育部重点实验室 南京 210093)

摘要 振动声成像是超声成像的一种重要形式，它可以得到包含共焦区组织的弹性信息和声衰减信息的信号，
将接收到的信号用于成像即可获得反映组织特性的图像。该文对大张角共焦换能器作用下振动声成像中声辐
射力和切变位移进行了理论计算和数值模拟，并通过改变张角变化及频率大小研究其对声辐射力和切变位移
的影响。这项工作为大张角共焦换能器在振动声成像中的应用提供了理论支持。
关键词 振动声成像，声辐射力，剪切波位移
中图法分类号: O424 文献标识码: A 文章编号: 1000-310X(2018)05-0751-07
DOI: 10.11684/j.issn.1000-310X.2018.05.021

Influence of the confocal transducer with a wide aperture angle on

vibro-acoustography

QI Meng LIU Xiaozhou LIU Jiehui MAO Yiwei

(Key Laboratory of Modern Acoustics, MOE, and Institute of Acoustics, Nanjing University, Nanjing 210093, China)

Abstract Vibro-acoustography is an important form of ultrasonic imaging. It can obtain the signal that
contains the elastic information and the acoustic attenuation information of the tissue in confocal area, the
received signal can be used for imaging that reflects the characteristics of the tissue. In this paper, under the
action of confocal transducer with a wide aperture angle, the theoretical calculation and numerical simulation
of acoustic radiation force and shear wave displacement in vibro-acoustography are carried out. The influences
of the aperture angle and frequency on acoustic radiation force and shear wave displacement are studied
separately. This work provides theoretical support for the application of the confocal transducer with a wide
aperture angle used in vibro-acoustography.
Key words Vibro-acoustography, Acoustic radiation force, Shear wave displacement

2018-06-04 收稿; 2018-07-23 定稿
国家自然科学基金项目 (11774167), 声场声信息国家重点实验室开放课题研究基金项目 (SKLA201809)
∗
作者简介: 戚萌 (1994- ), 女, 安徽淮北人, 硕士研究生, 研究方向: 生物医学超声。
† 通讯作者 E-mail: xzliu@nju.edu.cn