磁感应断层成像技术中涡流问题的有限元法仿真研究  

Simulation Study of Eddy Current Problem in Magnetic Induction Tomography by Using Finite Element Method

作　　者：王聪[1] 董秀珍[1] 刘锐岗[1] 史学涛[1] 付峰[1] 尤富生[1] 

机构地区：[1]第四军医大学生物医学工程系医学电子工程教研室,陕西西安710032

出　　处：《航天医学与医学工程》2007年第3期219-222,共4页Space Medicine & Medical Engineering

基　　金：国家自然科学基金重点项目(50337020)

摘　　要：目的为了求解磁感应断层成像(magnetic induction tomography,MIT)技术中的涡流问题,以获得MIT正问题的有效解法。方法推导了对应于MIT技术的涡流场的微分方程及其边界条件,采用有限元方法计算了场域内一些不同电导率或位置的扰动目标下的位函数。结果仿真计算结果与单线圈MIT系统的测量结果相吻合。结论本文提出的有限元计算方法适用于生物组织磁感应断层成像技术,是解决MIT正问题的一个有效方法,更完善的仿真计算模型有望进一步提高计算精度。Objective To solve the eddy current problem or the forward problem in magnetic induction tomography（MIT）. Methods Differential equation and its boundary condition of eddy current problem in MIT were presented; finite element method was used to calculate the magnetic vector potential of perturbations with different conductivities or positions. Results The simulation results agreed well with the measured ones from a single receiving coil MIT system. Conclusion The good agreement of the simulated data with the measured ones demonstrates the applicability of the finite element method for biomedical applications and a solution of the forward problem in MIT, a more sophisticated simulation model may further improve the calculation accuracv.

关 键 词：磁感应断层成像 正问题 有限元法 涡流 

分 类 号：R319[医药卫生—基础医学]