Abstract #4403

Towards Homogeneous 7T Neuro Imaging: Findings and Comparisons between 7T TTT and NOVA RF Coil Systems

Tamer S Ibrahim^1,2, Tales Santini¹, Shailesh Raval¹, Narayanan Krishnamurthy¹, Sossena Wood³, Jung-Hwan Kim¹, Yujuan Zhao¹, Xiaoping S Wu⁴, Essa S Yacoub⁴, Howard S Aizenstein⁵, and Tiejun Zhao⁶

¹Bioengineering, University of Pittsburgh, Pittsburgh, PA, United States, ²Radiology, University of Pittsburgh, Pittsburgh, PA, United States, ³Bioengineering, University of Pittsburgh, Cranberry Twp, PA, United States, ⁴Radiology, University of Minnesota, Minneapolis, MN, United States, ⁵Psychiatry, University of Pittsburgh, Pittsburgh, PA, United States, ⁶Siemens Medical Solutions, United States

Several major obstacles still face neuro UHF imaging including scanning and preparation time for every subject (for TX arrays) and RF intensity limitations due to increased local/global power deposition. The solutions provided and compared in this work represent non-subject specific configurations (combined mode NOVA coil system, PTX NOVA coil system operating in quadrature, and combined mode 16Tx/32Rx Tic-Tac-Toe coil system) and subject specific configurations (PTX NOVA coil system RF-shimmed for each subject). Experimental results shows significant drop in the B1+ field intensity in the left temporal lobe and cerebellum in the NOVA coil systems, issue alleviated with the Tic-Tac-Toe design.

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