Figure 2. DRR-images showing a four-field-treatment-plan for a patient with cancer of the pancreatic head (see Figure 3). Via the dorsal supplementary-field a higher dose is applied in the tumor-region. In this area 2.0 Gy are given per fraction whereas the loco-regional lymph-nodes received 1.8 Gy. A total of 50.0, respectively. 45.0 Gy were administered. Green lines: open field which will be modeled individually with the multi-leaf-collimator (yellow border). (Turquoise triangle: use of a wedge filter for dose optimization.)