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Abstract #0758

Optically Controlled Four-Channel Transceiver for 7T imaging with RF Monitoring Feedback

Natalia Gudino1, Jacco A de Zwart1, Peter van Gelderen1, and Jeff H Duyn1

1Advanced MRI Section, LFMI,NINDS, National Institutes of Health, Bethesda, MD, United States

In multi-channel RF transmission, monitoring and accurate control of amplitude and phase of the transmit signal is necessary to ensure safety. To this end, we present a four-channel transceiver array for 7T imaging built from optically-controlled on-coil amplifiers with optical real-time RF signal monitoring. Based on this monitoring signal an amplitude and phase control can be implemented for flexible, accurate and rapid control of B1 and SAR.

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