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Abstract #2181

Monitoring of RF transmit signal in on-coil current-source switch-mode amplification

Natalia Gudino1, Jacco A de Zwart1, Qi Duan1, Peter van Gelderen1, and Duyn Jeff H1

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

We demonstrate a new on-coil current-source switch-mode amplifier and communication setup for 7T imaging, which allows monitoring of the RF phase, frequency and amplitude at the amplifier output. This information is made available through a single optical signal per amplifier, making it a practical approach for safety monitoring and fast calibration of on-coil amplifier technology for parallel RF transmission.

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