猕猴脑部多通道接收线圈的仿真与设计

The simulation and design of a multi-channel RF coil for macaque

目的介绍一种用于消除磁共振线圈通道间耦合的仿真方法,指导猕猴脑部线圈的设计。材料与方法通过电磁场及电路仿真软件,计算线圈周围的空间电磁场分布及S参数,以观测通道间的耦合影响。结果在猕猴脑部接收线圈的设计过程中,通过仿真通道间的耦合可知:当相邻一组线圈的几何中心相距42.2 mm时,其耦合影响可以忽略不计,达到了线圈的设计要求。结论利用本文介绍的仿真方法,实现了猕猴脑部多通道线圈的去耦设计。在线圈的制作过程中,该方法可以明确优化方向,降低线圈的研发成本。

Objective: Introduce a new simulation method used to eliminate the couple between the coils for magnetic resonance, which will be applied to the design of a multi-channel receive coil. In the design of multi-channel coil for macaque, the adjacent coil’s decoupling position will be obtained by simulation. Materials and Methods: To evaluate the couple between the coils, we use electromagnetic field and circuit simulation software to calculate the coil’s electromagnetic field and S-parameter. Results: We obtain the decoupling position of the double round and the double square coil through simulation. The results are consistent with the theoretical calculation. In the design of the multi-channel receive coil, when the distance of centre is 42.2 millimeter, the couple between the coils can be neglected. Conclusion: The feasibility of the simulation method can be proved according to the results. The relative position of the adjacent coils will be obtained by simulation, which meets the demand of the design.