| 多导脑部磁刺激仪的设计与仿真 |
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| 引用本文： | 王学民,陈韵,郭明霞,王明时.多导脑部磁刺激仪的设计与仿真[J].天津大学学报(自然科学与工程技术版),2006,39(6):717-721. |
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| 作者姓名： | 王学民 陈韵 郭明霞 王明时 |
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| 作者单位： | [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 |
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| 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．
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| 关 键 词： | 磁刺激 线圈阵列 有限元分析 |
| 文章编号： | 0493-2137（2006）06-0717-05 |
| 收稿时间： | 2005-01-17 |
| 修稿时间： | 2005-01-172005-09-14 |
Design and Simulation of Multi-Channel Brain Magnetic Stimulator |
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| WANG Xue-min,CHEN Yun,GUO Ming-xia,WANG Ming-shi.Design and Simulation of Multi-Channel Brain Magnetic Stimulator[J].Journal of Tianjin University(Science and Technology),2006,39(6):717-721. |
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| Authors: | WANG Xue-min CHEN Yun GUO Ming-xia WANG Ming-shi |
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| Institution: | 1. School of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China ; 2. Department of Medical Imaging, Tianjin Medical University, Tianjin 300203, China |
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| Abstract: | 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. |
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| Keywords: | magnetic stimulation coil arrays finite-element analysis |
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