Klatskin tumor treated by inter-disciplinary therapies including stereotactic radiotherapy: A case report

Figure 1 CT slice of radiotherapy treatment plan in the drainage area (planning system: TMS Helax). 1-7: Coplanar beams. Isodoses: green: 100% = 48.0 Gy; light blue 1: 90% = 43.2 Gy; light blue 2: 80% = 38.4 Gy; light blue 3: 70% = 33.6 Gy; dark blue: 50% = 24.0 Gy. A: PTV (planning target volume): outer red line includes a safety rim. B: Body frame (low density materials to avoid shielding) with positioning marks. C: Vacuum cushion for reproducible fixation of the patient (low density materials to avoid shielding: not visible in CT scan). D: Drainage. E: Radio-opaque fiducials for the coordinate read out in longitudinal direction.