Abstract #3244

A 2kW non-magnetic RF power amplifier with negative feedback for 5T MRI proton imaging

Jun Luo^1,2,3, Shengping Liu¹, Jifeng Chen², and Ye Li^2,3

¹Chongqing University of Technology, Chongqing, China, ²Lauterbur Imaging Research Center, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China, ³Key Laboratory for Magnetic Resonance and Multimodality Imaging of Guangdong Province, Shenzhen, China

Synopsis

Parallel transmission technology has attracted much attention because of its advantages of uniform excitation and artifact correction in ultra-high field. A 2kW non-magnetic prototype RF amplifier for 5T multi-channel parallel transmission (pTx) is presented. It is equipped with analogic feedback loops and provides a high linearity up to peak output power. It maintains excellent fidelity performance even without a circulator.

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