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| Hybrid MOM/FDTD Electromagnetic Analysis Method and Application in MR RF Coil Design |
| School of Biomedical Engineering, Southern Medical University, Guangzhou 510515, China |
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Abstract 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.
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