中文摘要：

就感应式磁声成像的正问题，探讨该新型功能成像方法的可行性。建立了感应式磁声成像正问题的数学模型，并利用有限元软件Comsol Multiphysics3．4进行仿真实验，得到不同电导率分布的导体内部的感应电流分布及声压分布；同时，研究了线圈与物体相对位置参数a对感应电流的影响。仿真结果表明，感应电流密度在中心位置处为零，在电导率边界处变化较大；声压分布在中心位置处为零，在边界处变化较大。仿真结果与理论推导相符，进一步说明可由声信号重建物体内部的电导率分布方法的可行性。

英文摘要：

The aim of this study is to investigate the feasibility of the new functional imaging method. A theoretical model was constructed for the forward problem of magnetoacoustic tomography with magnetic induction, and the simulation study was carried out using Comsol Muhiphysics 3.4 software. The distribution of induced current and the acoustic pressure inside the spheres with different conductivity were presented. Furthermore, the relative position between the coil and the object was introduced to get its influence on the induced current. The induced current and the acoustic pressure was zero at the central of the object and varied rapidly on the boundary with different conductivity. The simulation result was consentient with the theoretical derivation, proving the feasibility that the conductivity coule be reconstructed from acoustic signals.