Abstract #1802
Multi-Channel MOSFET Amplifiers for Parallel Excitation in 7T Animal MRI System
Yizhe Zhang 1 , Yan Liu 1 , Bingyao Sun 1 , Xiaoliang Zhang 2 , and Xiaohua Jiang 1
1
Department of Electrical Engineering,
Tsinghua University, Beijing, China,
2
Department
of Radiology and Biomedical Imaging, University of
California San Francisco, San Francisco, CA, United
States
In this work, we developed a multi-channel transmission
system with compact MOSFET amplifiers for parallel
excitation in 7T animal MRI scanner. The system is
composed of a multi-channel RF controller and 4
independent RF power amplifiers. Each amplifier contains
two stages (using transistor MRF321 and MOSFET MRF177
for the first and second stage respectively). The design
was validated by simulation and bench test. The power
gain for the amplifier is 18.7dB at 300MHz,
demonstrating the sufficient amplification capability of
the transmission system for small animal parallel
transmission applications at 7T.
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