Metamaterial Double-loop RF Head Coil for UHF MRI: A Numerical Evaluation and Experimental Verification at 7T
Elizaveta Motovilova1, Yang Gao2,3, Zhihua Ren1, Xiaotong Zhang2,3, and Shao Ying Huang1,4
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 dependentof 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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