Abstract #4297

Metamaterial RF Shield with Reduced Specific Absorption Rate and Improved Transmit Efficiency for 9.4 T MRI

Haiwei Chen¹, Lei Guo¹, Mingyan Li¹, Chunyi Liu¹, Shanshan Shan¹, Yaohui Wang², Ewald Weber¹, Feng Liu¹, and Stuart Crozier ¹

¹the University of Queensland, Brisbane, Australia, ²South China University of Technology, Guangzhou, China

A novel RF shield using metamaterial absorber was designed for 9.4 T MRI. This new design focuses on improving the transmit efficiency of RF coils and reducing the Specific Absorption Rate (SAR) in the subject. A new layered unit cell structure of metamaterial absorber was used for constructing the RF shield. Full-wave simulation results were presented and compared with a conventional copper RF shield; the results suggest that the proposed structure could achieve improved imaging performance.

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