Synthetic MRI-aided pelvic multi-organ segmentation in cone-beam computed tomography

CBCT-guided adaptive prostate radiotherapy requires the accurate and rapid segmentation of the prostate and organs-at-risk from on-board CBCT images. Automatic segmentation based solely on CBCT can eliminate the need for registration to the planning CT, but has not been widely studied. Soft tissue contrast, such as prostate, is poor on CBCT images, which is often further degraded by CBCT artifacts. In this study, a new segmentation strategy is...