TABLE 2.
PTV and OARs requirements for the lung SBRT VMAT plans in five fractions.
| Organ | Constraint | Optimal | Mandatory |
|---|---|---|---|
| PTV | V95% | 100% | ≥98% |
| Dmax (0.1 cm3) | ≤60 Gy | – | |
| Spinal canal (including medulla) | Dmax (0.1 cm3) | <23 Gy | <30Gy |
| D1 cm 3 | <14.5 Gy | – | |
| Esophagus | Dmax (0.5 cm3) | <32 Gy | <34 Gy |
| Heart | Dmax (0.5 cm3) | <27 Gy | <29 Gy |
| Chest wall | D30 cm 3 | <32 Gy | – |
| Normal lungsm(lungs – gross tumor volume) | V20 Gy | – | <10% |
PTV, planning target volume; OARs, organs at risk; VXGy, volume receiving X Gy; DXcm 3, dose to X cm3 of the considered organ.