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Abstract #4803

Design of a 24-Mesh Inductive Birdcage for Imaging of the Head at 500 MHz

Joseph Murphy-Boesch 1 , Qi Duan 1 , Steve Dodd 1 , Natalia Gudino 1 , Shumin Wang 2 , and Jeff Duyn 1

1 National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, United States, 2 Department of Electrical and Computer Engineering, Auburn University, Auburn, AL, United States

An inductive birdcage resonator with 24 meshes has been assembled for imaging of the head in the confined space of an 11.7T head-only MRI system. To reduce radiative losses and de-tuning by the head, the resonator was suspended within its cylindrical shield with no direct RF connections. Four-port connection to the coil was effected using inductive couplers with balanced drive to further reduce E-fields. Bench sensitivity and field uniformity are similar to a 7T coil. Power testing using a custom phantom yielded differential temperature increases that can be used to validate EM simulations.

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