Table 2 Details of irradiations in the present case
| Â | First SBRT | Second SBRT |
|---|---|---|
Total dose (Gy) | 40 | 50 |
Fractions | 4 | 4 |
Prescription | PTV D95 | Isocenter |
Target volume | CTV = GTV | CTV = GTV |
ITV = CTV + 1 mm | ITV = CTV + 4 mm | |
PTV = ITV + 5 mm | PTV = ITV + 5 mm | |
Leaf margin (mm) | 5 | 0 |
Beam energy (MV) | 6 | 6 |
Beam arrangement | Non-coplanar dynamic arcs | Non-coplanar dynamic arcs |
Dose calculation | Superposition | Superposition |