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Abstract #0545

Parallel transmission approach for 7T based on optically controlled on-coil CMCD amplifiers

Natalia Gudino 1 , Qi Duan 1 , Joe Murphy-Boesch 1 , Jacco A de Zwart 1 , Hellmut Merkle 1 , Peter Van Gelderen 1 , and Jeff H Duyn 1

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

An approach to perform parallel RF transmission with on-coil CMCD amplifiers at 7T is evaluated. An optimized 2-channel prototype based on eGaN FET technology was built and tested. Artifact-free images of a gel phantom were obtained by transmitting with the array and receiving signal with a detunable volume receive coil. The results suggest that this technology provides a practical solution for the use of multi-channel B1-shimming and other parallel transmit applications at high field.

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