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Abstract #1589

Circumventing Radiation Beam and RF-Coil Collisions in a Rotating B0 Linac-MR Hybrid using a Three-channel Array

Vyacheslav Volotovskyy1, Radim Barta2, Keith Wachowicz1,2, Nicola De Zanche1,2, and B. Gino Fallone1,2

1Medical Physics, Cross Cancer Institute, Edmonton, AB, Canada, 2Oncology, Division of Medical Physics, University of Alberta, Edmonton, AB, Canada

Hybrid radiation therapy and magnetic resonance imaging (MRI) systems are providing new options for cancer therapy. In our design the B0 rotates on a gantry along with the linear accelerator (linac) for treatment delivery. This introduces new challenges to RF-coil design as the plane of MR precession changes depending on gantry angle. Our three channel array is appropriate for the head and consists of two butterfly coils and a circular loop. The array provides equal SNR at all gantry angles while allowing a radiation window to avoid collisions between the radiation beam and the RF-coils.

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