折叠变形磁刺激圆形线圈空间磁场分析

Analysis of the Magnetic Induction Field Distribution for Deformed Round Coil with Bending Angle in Magnetic Stimulation

为了进一步提高圆形线圈的刺激聚焦度,设计了沿不同位置折叠变形的圆形线圈.通过数值模拟分析了变形折叠位置与折叠角度的圆形线圈空间磁场的分布.与传统圆形线圈相比,单侧离圆心0.5、1、1.5 cm处折叠的变形圆形线圈磁场聚焦度明显提高,最佳折叠角分别是60°-90°、60°-105°和75°-105°.而单侧离园心2 cm处折叠变形圆形线圈、双侧离园心2 cm处折叠变形圆形线圈,空间磁场聚焦末能提高.

In order to improve the stimulation locality, the deformed round coils with different bending angles at different positions have been designed. 3D distributions of the magnetic induction fields have been obtained through numerical simulations, and the results were compared with that of conventional round coil. Results show that stimulation locality can been well improved when the coil was unilaterally bended along a line 0.5 cm and 1 cm and 1.5 cm away from the coil center, and the best bending angle was 60° - 90° ,60° - 105° and 70° - 105° respectively. While for other cases i. e. unilaterally bending 2 cm away from the coil center, bilat- erally bending etc. , the locality become worse