Abstract #4318

Metamaterial Double-loop RF Head Coil for UHF MRI: A Numerical Evaluation and Experimental Verification at 7T

Elizaveta Motovilova¹, Yang Gao^2,3, Zhihua Ren¹, Xiaotong Zhang^2,3, and Shao Ying Huang^1,4

¹Engineering Product Development, Singapore University of Technology and Design, Singapore, Singapore, ²Interdisciplinary Institute of Neuroscience and Technology, Zhejiang University, Hangzhou, People's Republic of China, ³College of Biomedical Engineering & Instrument Science, Zhejiang University, Hangzhou, People's Republic of China, ⁴Department of Surgery, National University of Singapore, Singapore, Singapore

This study presents a numerical evaluation of a novel RF coil array for human head imaging at 7T. The 8-element coil was developed using a metamaterial concept. As the main advantage of a metamaterial transmission line is that the uniformity of RF-magnetic near field does not dependent of the TL’s physical length, we applied this meta-TL concept to a loop in order to achieve a larger coverage of B₁⁺-field. Numerical comparison to conventional designs demonstrate an improved B₁-field homogeneity of the proposed coil. Preliminary experimental studies show a reasonable agreement with simulations.

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