Abstract #0765

Dual-Tuned Optically Controlled On-Coil Switch-Mode Amplifier

Natalia Gudino¹, Stephen J Dodd¹, Steve Li², and Jeff H Duyn¹

¹LFMI, NINDS, National Institutes of Health, Bethesda, MD, United States, ²MIB, NIMH, National Institutes of Health, Bethesda, MD, United States

Optically controlled on-coil amplifiers have been presented for the practical implementation of pTx system at ultra-high field MRI. We present a new prototype that can transmit power to excite ¹H and X-nuclei. We show bench and MRI data with a dual-tuned on-coil amplifier implementation for ¹H and ³¹P excitation at 7T. We expect this technology can allow a simpler and more versatile implementation of a multinuclear multichannel hardware compared to the traditional multinuclear setup based on 50 Ω broadband voltage mode amplification.

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