Abstract #4243

End-Grounded Dipole RF Element with Extended Coverage and Minimized SAR at 7T MRI

Haiwei Chen¹, Lei Guo¹, Yang Gao², Zhiyan Quan³, Xiaocui Tang³, Sihong Pan³, Feng Liu¹, and Xiaotong Zhang³

¹the University of Queensland, Brisbane, Australia, ²School of Electronic Engineering (National Key Laboratory of Antennas and Microwave Technology) and Hangzhou Institute of Technology, Xidian University, Hangzhou, China, ³Zhejiang University, Hangzhou, China

Synopsis

Keywords: RF Arrays & Systems, RF Arrays & Systems

Dipole RF coil suffers from high peak local SAR and limited imaging coverage. In this work, a novel dipole structure is proposed. Compared with the fractionated dipole, the proposed design achieves a substantially enlarged B₁field coverage and more than 25% SAR reduction by generating a uniform surface current on the coil. Experimental validations were conducted and agreed well with the simulation results.

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