| Analysis of Magnetic Field Inducted in Brain by Multi-Channel Magnetic Stimulation |
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| 作者姓名： | 陈韵 王学民 郭明霞 王明时 |
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| 作者单位： | School of Precision Instrument and Opto-Electronics Engineering Tianjin University，School of Precision Instrument and Opto-Electronics Engineering Tianjin University，Department of Medical Imaging Tianjin Medical University，School of Precision Instrument and Opto-Electronics Engineering Tianjin University，Tianjin 300072 China，Tianjin 300072 China，Tianjin 300203 China，Tianjin 300072 China |
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| 基金项目： | 国家自然科学基金;天津市高等学校科技发展基金 |
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| 摘 要： | Magnetic stimulationis used to excitetissue in the hu-man nervoussystempainlesslyand noninvasively,andis al-so atool forinvestigatingbrainfunction1—11].Usually,themagnetic stimulator has one circular coil or afigure-of-eightcoil ,and the coil needs to b…
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| 关 键 词： | 脑疾病 刺激作用 有限元分析 磁性检测 |
| 修稿时间： | 2007-04-10 |
Analysis of Magnetic Field Inducted in Brain by Multi-Channel Magnetic Stimulation |
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| CHEN Yun,WANG Xuemin,GUO Mingxia,WANG Mingshi.Analysis of Magnetic Field Inducted in Brain by Multi-Channel Magnetic Stimulation[J].Transactions of Tianjin University,2007,13(4):242-246. |
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| Authors: | CHEN Yun WANG Xuemin GUO Mingxia WANG Mingshi |
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| Institution: | 1. School of Precision Instrument 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: | Multi-channel magnetic stimulation is an efficient method to improve the conventional magnetic stimulation. A multi-channel magnetic brain stimulator was developed and the distribution of magnetic field was calculated by finite-element analysis software-ANSYS. The results show that when five coils work simultaneously, the area where the magnetic flux density is larger than 0.01 T would expand to almost the whole brain region, and the magnetic stimulation depth would be improved. Experiments were performed on ten subjects (mean age 25) using the stimulator, and the EEG power spectrums before and after stimulation were analyzed. The experimental results show that the beta component of EEG obviously increases after magnetic stimulation, and the effect is more obvious by using more coils simultaneously because of the deeper stimulation. |
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| Keywords: | brain finite element analysis multi-channel magnetic stimulation |
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