Differences in urethral dosimetry between CT and MR imaging in multichannel vaginal cylinder brachytherapy

摘要

PURPOSE: In image-based brachytherapy (IBBT), the dosimetry of small structures may be particularly sensitive to changes in contouring between imaging modalities. We therefore sought to characterize differences in urethral dosimetry in vaginal brachytherapy based on contouring on MRI vs. CT.