Fig. 1From: Radiobiological model-based approach to determine the potential of dose-escalated robust intensity-modulated proton radiotherapy in reducing gastrointestinal toxicity in the treatment of locally advanced unresectable pancreatic cancer of the headOverview of the beam configuration (a and b) and axial, sagittal, and coronal CT slices showing dose distribution of IMRT (c) and ro-IMPT (d) treatment plan. The range of beam direction and couch angle in all patients is given per beam direction. Non-coplanar beam direction is marked in green, and co-planar beam direction in whiteBack to article page