A radiofrequency (RF) power amplifier is an essential component of any MRI system. Unfortunately, no commercial amplifier exists to fulfill the needs of the transmit array spatial encoding (TRASE) technique, requiring minimum 50% duty cycle, high output power 1 kW and independently controlled multi-channel capability. Hence a home-made dual channel RF power amplifier dedicated for TRASE at 0.22 T (9.27 MHz) was made using commercially available components. High spatial resolution one-dimensional TRASE was obtained with the power amplifier to demonstrate its capability. The results were compared with the commercial amplifiers, Analogic AN8110 and TOMCO BT00500, exceeding performance considering electronic noise and duty cycle.
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