新型经颅磁刺激线圈的设计与优化-《中国医学物理学杂志》

文章信息/Info

Title:: Design and optimization of a novel transcranial magnetic stimulation coil

Author(s):: LIANG Jie; SHI Sushuang; YAO Shuang; SHI Zhanqun; School of Mechanical Engineering, Hebei University of Technology, Tianjin 300401, China

Keywords:: Keywords: transcranial magnetic stimulation coil shield plate focusing area stimulation depth

摘要:: 目的：设计一种新型线圈，并使用屏蔽板优化聚焦面积，以便于线圈能最大程度满足使用要求。方法：以3层头球模型为基础，使用COMSOL仿真软件，建立真实人体头部模型，进行有效性验证后将传统8字形线圈、新型线圈与头部模型进行联合仿真，探究新型线圈最优性能参数。通过增加屏蔽板进一步提高线圈聚焦性，并分析不同屏蔽板窗口尺寸对聚焦性的影响。结果：将新型线圈与传统8字形线圈进行数据对比，新型线圈大脑中磁场强度提高32%、刺激深度提高152%、聚焦面积略有扩大，聚焦性降低7.2%，综合性能优于传统8字线圈。使用600 mm2窗口尺寸的屏蔽板进行优化后，新型线圈的聚焦性提高30%，验证了屏蔽板对线圈性能的影响。结论：证明了新型线圈在性能参数方面的可行性，探究了不同的线圈尺寸和屏蔽板尺寸对评价指标的影响，为经颅磁刺激后续研究奠定基础。

Abstract:: Abstract: Objective To design a new type of coil and use a shield plate to optimize the focusing area, so that the coil can meet the usage requirements to the greatest extent possible. Methods Based on a 3-layer head model, COMSOL simulation software was used to establish a real human head model. After effectiveness verification, the traditional 8-shaped coil, new coil, and head model were jointly simulated to explore the optimal performance parameters of the new coil. The focusing performance was further improved by adding a shield plate, and the effects of different shield plate window sizes on focusing performance were analyzed. Results Compared with the traditional 8-shaped coil, the new coil improved the magnetic field intensity in the brain by 32%, increased the stimulation depth by 152%, but slightly expanded the focusing area, decreasing the focusing performance by 7.2%, which demonstrated the superior performance of the new coil than the traditional 8-shaped coil. After optimization using a shield plate with a window size of 600 mm2, the focusing performance of the new coil was improved by 30%, verifying the effectiveness of the shield plate on the coil performance. Conclusion The feasibility of the new coil is proved in terms of performance parameters, and the effects of different coil sizes and shield plate sizes on evaluation indicators are explored, laying a foundation for subsequent research on transcranial magnetic stimulation.