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Abstract #3023

Imaging Study with Ultra-Low Output Impedance RF Power Amplifiers

Xu Chu1, Tingting Song1, Xing Yang1, Eric W. Fiveland2, Yudong Zhu3

1GE Global Research Center, Shanghai, China; 2GE Global Research Center, Niskayuna, NY, USA; 3Langone Medical Center, New York University, New York, NY, USA

The feasibility of inter-element decoupling in parallel excitation by ultra-low output impedance RF power amplifier in a high field MR environment was evaluated. By presenting low source impedance at the output port of an amplifier, the current induced by neighbor coils is blocked by the high impedance at the input port of the coil. The transmit coil could be driven by this amplifier through a nλ/2 cable, which enabled the placement of amplifiers in the equipment room and relaxed the compatibility requirements on power electronics and facilitated system integration. The 1st set of images acquired with 3T scanner were presented.