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Abstract #1339

A Fully Integrated Automatic Tune and Match System for an 8-Channel Transmit/Receive Cardiac TEM Array at 7T: Initial Results in a Phantom and Volunteers

Graeme A Keith 1 , Christopher T Rodgers 1 , Aaron T Hess 1 , Carl J Snyder 2 , J Thomas Vaughan 2 , and Matthew D Robson 1

1 Oxford Centre for Clinical Magnetic Resonance Research, University Of Oxford, Oxford, Oxfordshire, United Kingdom, 2 Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, Minnesota, United States

Results in both a saline phantom and in humans are presented for an auto-tune system using piezoelectric actuators and MATLAB control. The system was implemented on an 8-channel pTx cardiac TEM array for use at 7T. A rigorous performance evaluation algorithm was run on the phantom and found that in the majority of cases the S 11 was significantly improved by the system. The system was then employed on human subjects, and it was found that it could successfully tune on a person in a maximum of 6 minutes. The system is now in routine use in our lab.

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