Comparisons of representative initial DL auto-segmentation (yellow), ACR (red), and ground truth (green) contours for the small bowel, large bowel, pancreas, duodenum, and stomach on MR-SIM data. Images shown are rescaled for better display (they do not reflect their original sizes). Abbreviations: ACR = automatic contour refinement; DL = deep learning; MR-SIM, magnetic resonance scans from radiation therapy simulation.