多导脑部磁刺激仪的设计与仿真  

Design and Simulation of Multi-Channel Brain Magnetic Stimulator

作　　者：王学民[1] 陈韵[1] 郭明霞[2] 王明时[1] 

机构地区：[1]天津大学精密仪器与光电子工程学院,天津300072 [2]天津医科大学医学影像系,天津300203

出　　处：《天津大学学报》2006年第6期717-721,共5页Journal of Tianjin University(Science and Technology)

基　　金：国家自然基金资助项目(30350003)天津市教育委员会科技发展基金资助项目(20030219).

摘　　要：大脑神经系统可由外部的时变磁场加以无创刺激,考虑到要对大脑多个不同部位同时进行刺激的情况, 提出了一种由多线圈组成的多导脑部磁刺激系统．用有限元分析软件ANSYS模拟了线圈阵列工作时所产生的磁场,并与实验测得的磁场进行了比较．结果表明,软件仿真的数据精度误差在6％以内,并总结出变化规律:随着刺激线圈个数的增加,中心线圈轴线上同位置处的磁感应强度逐渐加大,与单线圈工作时相比,磁刺激深度得到了有效改善．Nervous system of brain can be stimulated non-invasively with externally time-varying magnetic fields. A multi-channel magnetic stimulation system is developed to stimulate different regions of brain at the same time. Magnetic fields induced by coil arrays are simulated by using finite-element analysis software ANSYS and the results of simulation are compared with experiment. The results show that the error rate between simulation and experiment is less than 6%, and when increasing the number of the stimulating coils, the intensity of magnetic induction becomes larger at the same point and the depth of magnetic stimulation in brain is improved evidently.

关 键 词：磁刺激 线圈阵列 有限元分析 

分 类 号：Q64[生物学—生物物理学]