利用k-Wave计算超声在腹壁组织的声辐射力  

Calculation of acoustic radiation force on abdominal wall tissue induced by ultrasound using the k-Wave Toolbox

作　　者：乔玉配 宫门阳 汪海宾 李楠[1] 刘杰惠[1] 毛一葳[1] 何爱军[3] 刘晓宙[1] QIAO Yupei;GONG Menyang;WANG Haibin;LI Nan;LIU Jiehui;MAO Yiwei;HE Aijun;LIU Xiaozhou(Key Laboratory of Modern Acoustics,Collaborative Innovation Center of Advanced Microstructures,Institute of Acoustics and School of Physics,Nanjing University,Nanjing 210093,China;School of Science,Jiangsu University of Science and Technology,Zhenjiang 212003,China;School of Electronic and Science Engineering,Nanjing University,Nanjing 210093,China)

机构地区：[1]近代声学教育部重点实验室,南京大学声学研究所,人工微结构科学与技术协同创新中心,南京210093 [2]江苏科技大学理学院,镇江212003 [3]南京大学电子科学与工程学院,南京210093

出　　处：《应用声学》2021年第1期80-88,共9页Journal of Applied Acoustics

基　　金：国家重点研发计划项目(2017YFA0303702);国家自然科学重点基金项目(11834008);国家自然科学面上基金项目(11774167);声场声信息国家重点实验室项目(SKLA202008);中国科学院水声环境特性重点实验室项目(SSHJ-KFKT-1701);国家质检总局技术研发计划项目(2017QK125)。

摘　　要：随着科学技术的发展,声辐射力在生物医学领域得到了更为广泛的应用,尤其是在弹性成像领域。为了使弹性成像技术更加精准,对声辐射力的预测至关重要。该文基于腹壁组织图像,利用k-Wave对超声波在腹壁组织区域传播时的声场进行数值模拟,获得了其声场分布,进而求得了组织中声辐射力分布情况,同时对面阵换能器的阵元宽度、间距、阵元个数以及工作频率等参量对声辐射力的影响进行了计算与分析。结果表明,腹壁组织的声场分布受其非均匀性的影响,声辐射力的分布情况依赖于换能器参量的选择。该研究为声辐射力在弹性成像技术中的应用奠定了基础,为其技术的改进提供了重要依据。With the development of technology,acoustic radiation force has been widely used in biomedical field,especially in elastography.To pursue more accurate elastography technology,the prediction of acoustic radiation force is very important.In this paper,based on the image of an abdominal tissue wall tissue,the sound field of ultrasonic propagating in the abdominal wall tissue is simulated using k-Wave,and the sound field distribution is obtained.The distribution of acoustic radiation force is also presented.Moreover,the effects of the width,spacing,number of elements and working frequency on the acoustic radiation force are calculated and analyzed.The results show that the acoustic field distribution of abdominal wall tissue is affected by its inhomogeneity,and the distribution of acoustic radiation force depends on the selection of transducer parameters.This study lays a basis for the application of acoustic radiation force in elastography technology,and will guide the later improvement of the technology.

关 键 词：k-Wave 弹性成像 声辐射力 

分 类 号：O424[理学—声学] O426[理学—物理]