Abstract #2672

Human Brain Imaging at 7T With On-coil Transceivers

Natalia Gudino¹, Qi Duan^1,2, Jacco A de Zwart¹, Stephen J Dodd¹, Joe Murphy-Boesch¹, Peter van Gelderen¹, and Jeff H Duyn¹

¹Advanced MRI Section, LFMI, NINDS, National Institutes of Health, Bethesda, MD, United States, ²Food and Drug Administration, Silver Spring, MD, United States

On-coil current-source switch-mode amplification presents high power efficiency, allows direct control of the transmit field (B1), and decoupling of elements through the amplifier output impedance. These are important advantages over conventional remote voltage-mode quasilinear amplification that should allow more efficient and safer implementation of a multi-channel transmit system. Following this approach, we present an optically controlled transceiver design that was used for initial safety assessment of the technology toward the implementation of a high channel-count pTx array for brain imaging at high-field. We acquired human brain images with this technology at 7T

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