中文摘要：

研究的目的在于增强磁共振射频线圈仿真的真实性,提高射频线圈设计水平,从而提高线圈的成像质量。充分利用矩量法（MOM）在计算复杂结构线圈上电流分布的优势,以及时域有限差分（FDTD）方法在仿真人体模型等复杂的不均匀电磁介质中的优势,通过惠更斯等效面将MOM和FDTD有机地结合到一起,形成混合MOM/FDTD射频线圈设计方法,并提出一种新的真实人体电磁模型建立方法,融入到混合方法中,充分考虑线圈与真实人体组织之间复杂的电磁相互作用。由该方法设计的原型线圈扫描图像的信噪比达到193.4dB,相比先前未考虑人体与线圈之间作用的方法,所以得到的图像信噪比提高了38.7 dB,从而验证了仿真设计的正确性。

英文摘要：

The purpose of this paper is to improve the simulation accuracy of MR RF coil,then to improve the quality of MR image.We take advantages of the method of moment（MOM） and finite difference time domain（FDTD） method,that is,MOM is suitable for the calculation of current distribution on the RF coil structure,FDTD is suitable for the electromagnetic field analysis in the case of human body.We used the Huygens＇ equivalent surface to combine the MOM and FDTD to form a new hybrid MOM/FDTD method.With the proposed real human body 3D electromagnetic model,we considered the complex coil tissue interactions effectively.The signal-to-noise ratio（SNR） of the image,which is designed by the method,was 193.4 dB,38.7dB more than which does not consider the interactions.Consequently,the results verified the accuracy of the design.