Abstract #0761

A Non-Magnetic Staggered Commutation Based Circulator to Achieve Time-Efficient Simultaneous Transmit and Receive (STAR) MRI

Hazal Yuksel¹, Lance DelaBarre², Djaudat Idiyatullin³, Julie Kabil⁴, Gregor Adriany³, Sung-Min Sohn⁵, Harish Krishnaswamy ¹, John Thomas Vaughan ⁴, and Michael Garwood³

¹Electrical Engineering, Columbia University, New York, NY, United States, ²Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, United States, ³University of Minnesota, Minneapolis, MN, United States, ⁴Columbia University, New York, NY, United States, ⁵Arizona State University, Tempe, AZ, United States

Traditional MRI relies on the temporal separation of the receiver (RX) and transmitter (TX) to solve the problem of self-interference. Often, the TX signal is billions of times larger than the RX signal, and T/R switches are used so the TX does not saturate or destroy the RX. This leads to an inefficient method of acquiring imaging data for especially fast decaying signals. We propose a magnetic-free, PCB based circulator to remove the T/R switch and achieve simultaneous transmit and receive MRI. We present images of a phantom acquired with a continuous SWIFT sequence to validate the concept.

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