Fig. 5.

Intrafraction motion seen on verification and post-treatment MRI for two example patients. Contours for GTV (red), PTV50 (orange), PTV25 (pink) small bowel (green) and stomach_duodenum (purple) as well 33 Gy isodose line (cyan) color from pre-treatment plan is displayed on the verification and post-treatment MRI. Green arrows indicate the intrafraction motion of small bowel. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)