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Abstract #4503

Dynamic Decoupling for Simultaneous Transmission and Acquisition in MRI

Bilal Tasdelen1,2, Alireza Sadeghi-Tarakameh1,2, Ugur Yilmaz2, and Ergin Atalar1,2

1Department of Electrical and Electronics Engineering, Bilkent University, Ankara, Turkey, 2National Magnetic Resonance Research Center (UMRAM), Ankara, Turkey

In order to use simultaneous transmission and acquisition in clinical MRI for living subjects, robustness to load and environmental changes has to be established, especially for uncooperative subjects. High isolation can be achieved with active cancellation methods, but maintaining it over a long time is a challenge. A look-up table based method is proposed with a smart search algorithm that enables fast dynamic decoupling of transmit/receive coils using an active decoupling circuit. Experiments with a birdcage coil used as a transceiver show that maintaining >80 dB isolation is possible even under the presence of load variation.

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