摘要
目的实现在目标区域内的电磁场聚焦 ,解决功能磁刺激的兴奋点定位问题。方法建立了单线圈磁刺激模型并设计了半球形和平面聚焦线圈阵列 ,而后使用经过改进的自适应遗传算法对注入阵列各子线圈电流的大小和相位进行了优化。结果通过计算 ,显示了线圈阵列在优化后的电流组态下产生的磁场和电场在计算区域内的分布和二维等高线图。结论本文提出的聚焦线圈阵列可在目标区域产生具有良好聚焦性能的电磁场分布 。
Objective To locate the activation point in functional magnetic stimulation (FMS). Method Coil arrays were applied to establish the magnetic field distribution with ideal focusing capability. Models of hemispherical and plane coil arrays were established. Then an improved adaptive genetic algorithm (GA) was applied in the optimization of value and phase of the electric current infused into each coil. Result Based on the calculated results of the optimized current configurations, ideal focusing capability was drawn as contour lines and 3-D mesh charts of the magnitude of magnetic and electric field within the calculated area. Conclusion It was shown that the coil arrays have good capability to establish the magnetic distribution in focused shape. In addition, it was also shown that the coil arrays have the capability of focusing on two or more targets simultaneously.
出处
《航天医学与医学工程》
CAS
CSCD
北大核心
2004年第5期365-369,共5页
Space Medicine & Medical Engineering
基金
国家自然科学基金杰出青年科学基金资助( 60 12 5 10 2 )
关键词
功能磁刺激
线圈阵列
聚焦
遗传算法
function magnetic stimulation
coil array
focusing
genetic algorithm
