磁刺激人体可兴奋组织的模及其感应电场的三维分析

磁刺激是利用时变电流流入线圈，产生时变磁场，从而在组织内感应出电流使某些可兴奋性组织产生兴奋的一种无创的诊断和治疗技术。本文建立了磁刺激可兴奋性组织的一般模型。确定了一些无量纲参数，对感应电场的分布函数进行无量纲化，并给出强度三维分布的计算机仿真。文中分析和讨论了决定刺激聚焦和刺激深度的因素，确定了设计合理的磁刺激线圈和可以使刺激效果和磁刺激装置都得到优化的依据。

Modelling and 3D Analysis of its Induced Electric Field of Magnetic Stimulation of Excitable Tissue of Human Body

Magnetic stimulation is a noninvasive diagnostic and therapeutic technique based on the principle that time varying current in coil can generate time varying magnetic field, and the magnetic field can induce current to stimulate some excitable tissues. A general model of the magnetic stimulation of excitable tissue is presented. A set of dimensionless parmeters is determined and used to make the spatial distributive function of the induced electric field have no dimensions. By computer simulation of 3D distributions of the intensities of the induced electric field, factors, determining magnetic stimulation concentration and depth, are analysed and discussed. Basis for designing a reasonable coil and stimulator to achieve optimal stimulation effect are established.