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Abstract #1585

High power RF amplifier for UHF MRI with configurable number of channels

Jifeng Chen1,2, Ye Li1, Han Zhang2, Bin Cao2, Xin Liu1, Hairong Zheng1, and Xu Chu2
1Lauterbur Imaging Research Center, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China, 2United Imaging Healthcare, Shanghai, China

Increasing magnetic field strength can improve signal-to-noise ratio (SNR) of MRI [1] and it requires higher power capability and fidelity from RF Power Amplifier (RFPA). Meanwhile, to reduce B1 inhomogeneity at high field usually requires multi-channel parallel transmission (pTx) technique. In this study, we present a method to design RFPA with high power capability and output linearity, and with configurable number of transmit channels so as to meet different RF coil and load requirements.

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