经颅磁刺激参数与结构要件的影响分析

为了进一步探索经颅磁刺激工作机理并改进或研制出新的经颅磁刺激激励源.本文从经颅磁刺激的原理推导出了磁场、感应电流及激励源原理电路电流的表达式,利用大脑-线圈和大脑-线圈-铁芯两种经颅磁刺激模型分析影响因素与头模型各组织的磁场和感应电流分布.对比分析表明电流的性质,线圈半径,线圈激励特性与铁芯对感应电流分布与电磁场分布有着本质的影响.对经颅磁刺激参数及结构要件的研究与分析可用于指导刺激线圈参数及激励源电路参数的设置,以及探索新的激励源制作.

Analysis of transcranial magnetic stimulation parameters and the impact of structural elements

In order to further explore the transcranial magnetic stimulation(TMS) working mechanism and improve or develop new TMS drive source. This article is derived from the theory of TMS, the induced current and the circuit current expression of the magnetic field excitation source principle , using two TMS model of the brain-coil and the brain-coil-iron core coil to analyze influence factors and magnetic field and the induced current distribution for the model of all kingds of organizations. The contrast analysis shows that the nature of current, radius of coils , the excitation characteristics of coil and iron core have essential influence to the induced current distribution and electromagnetic field distribution. The research and exploration of TMS parameters and structural elements can be used to guide the stimulating coil parameters and excitation circuit parameters settings, and explore new incentive source production.