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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 ,并给出了电场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。
Magnetic stimulation is a noninvasive diagnostic and therapeutic technique that uses a time-varying current to flow into a coil to create a time-varying magnetic field that induces current in the tissue to excite certain excitable tissues. This article establishes a general model of excitable tissues that can be magnetically stimulated. Some dimensionless parameters are determined, the distribution function of induced electric field is dimensionless, and the computer simulation of three-dimensional distribution of electric field strength is given. In this paper, the factors that determine the stimulus focus and stimulus depth are analyzed and discussed. The design of the magnetic stimulation coil and the optimization of the stimulation effect and the magnetic stimulation device are confirmed.