Fig. 1From: Online adaptive magnetic resonance guided radiotherapy for pancreatic cancer: state of the art, pearls and pitfallsExample of inter-fraction variability for the case of upper abdomen, as occurred between two consecutive days of treatment in the same patient’s preparation conditions. The duodenum position (orange) significantly changes its position respect to the pancreatic cancer (red). A 3 cm wide region surrounding the GTV is reported in greenBack to article page