组织电导率性质对磁感应磁声耦合成像声源强度的影响-《中国医学物理学杂志》

文章信息/Info

Title:: Effects of tissue conductivity properties on acoustic source intensity for magnetoacoustic tomography with magnetic induction

作者:: 王世刚1; 何乐民1; 游敏娟2; 马任3; 刘志朋3; 1.山东第一医科大学（山东省医学科学院）放射学院，山东泰安 271016； 2.山东医药技师学院，山东泰安 271016； 3.中国医学科学院北京协和医学院生物医学工程研究所，天津 300192

Author(s):: WANG Shigang1; HE Lemin1; YOU Minjuan2; MA Ren3; LIU Zhipeng3; 1. Department of Radiology, Shandong First Medical University (Shandong Academy of Medical Sciences), Taian 271016, China 2. Shandong Medicine Technician College, Taian 271016, China 3. Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, China

Keywords:: conductivity anisotropy magnetoacoustic tomography with magnetic induction acoustic source

摘要:: 针对部分生物组织电导率分布具有各向异性的特点，对磁感应磁声耦合成像的声源强度特征进行理论分析，推导不同电导率性质的声源强度公式，并运用COMSOL Multiphysics5.5建立生物组织电导率模型，进行电磁场仿真分析求解，用Matlab 2016a计算其振动声源。结果证明，在同样磁场激励条件下，电导率各向同性和各向异性的声源分布都能反映生物组织的层析结构，但其强度不同。本研究为磁感应磁声耦合成像逆问题声源的精确重建提供了理论基础。

Abstract:: In view of the fact that the conductivities of some biological tissues are anisotropic, the characteristics of acoustic source intensity for magnetoacoustic tomography with magnetic induction are theoretically analyzed, and the formula of acoustic source intensity with different conductivity properties is deduced. A biological tissue conductivity model is established using COMSOL Multiphysics5.5 for electromagnetic field simulation analysis, and the vibration acoustic source is calculated using Matlab 2016a. The results show that both the acoustic sources with isotropic and anisotropic conductivities can reflect the tomographic structure of biological tissues under the same magnetic field excitation conditions, but the acoustic source intensities are different. This study provides a theoretical basis for the accurate acoustic source reconstruction for magnetoacoustic tomography with magnetic induction.