Abstract
Guidelines for GYN brachytherapy recommend the use of MR images for contouring treatment volumes. Removing the need for a patient CT applicator reconstruction can improve planning efficiency, reduce imaging dose, and reduce time patient has the applicator in place. However, titanium tandem and ring applicators (T&R) are more difficult to visualize in a MR than in a CT. In this study, we evaluated the reproducibility of MR-only based digitization and propose an alternative workflow where a reference T&R CT is used as an intermediary step during planning.
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