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Abstract #0947

Direct Generation of MR Images in a Divergent Coordinate System for MRI Radiotherapy Hybrids

Keith Wachowicz1,2, Brad Murray1,2, and B Gino Fallone1,2

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

The direct generation of images in a divergent coordinate system may be important to some applications of MR imaging in MRI-radiotherapy hybrids. Specifically, in the circumstance where 2D images are being used for real-time therapy beam guidance, image generation in a divergent coordinate system that matches that of the treatment beam (which originates from a single source point) will reduce targeting errors and inadvertent dosing of critical structures. This work presents a theoretical hardware solution to a variety of MRI-radiotherapy implementations which involve the replacement or augmentation of conventional linear gradients. An experimental and simulated verification is presented.

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