Abstract #4259

Eight-element Rotating Radiofrequency Coil Array with the Combination of Dipole and Loop Coils for Efficient B1 Shimming and SAR control at 7T

Mingyan Li¹, Jin Jin^1,2,3,4, Aurelien Destruel¹, Lei Guo¹, Ewald Weber¹, Feng Liu¹, and Stuart Crozier¹

¹School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, Australia, ²Siemens Healthineers, Brisbane, Australia, ³4. Mark and Mary Stevens Neuroimaging and Informatics Institute, University of Southern California, Los Angeles, CA, United States, ⁴ARC Training Centre for Innovation in Biomedical Imaging Technology, The University of Queensland, Brisbane, Australia

An 8-element rotating radiofrequency coil array (RRFCA) consisting of loop and dipole pairs is proposed. By placing the dipole coil along the central axis of the loop coil, they are naturally decoupled due to the orthogonality of their polarised fields. Compared with a traditional 8-element static dipole coil array, the RRFCA is designed to provide better B₁ shimming and SAR control performance benefited from the physical rotation. In addition, with eight coil elements, SNR will be improved compared to the previously developed 4-element RRFCA.

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