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Abstract #1601

A High Duty Cycle, Multi-channel, RF Power Amplifier for High Resolution TRASE MRI

Aaron Purchase1, Tadeus Palasz2, Hongwei Sun1, Jonathan Sharp1, and Boguslaw Tomanek1

1Department of Oncology, University of Alberta, Edmonton, AB, Canada, 2Department of Physics, Jagiellonian University, Krakow, Poland

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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