Table 2 IMRT planning goals and constraints
Structure | Constraint |
|---|---|
PTV | Min. dose ≥65 Gy |
Max. dose ≤70 Gy | |
Volume receiving ≥66 Gy more than 95% | |
Total lung | Dmean 20Â Gy |
Volume receiving ≥20 Gy less than 30% | |
Volume receiving ≥30 Gy less than 20% | |
Spinal cord | Max. point dose ≤40 Gy |
Heart | Volume receiving ≥40 Gy less than 100% |
|  | Volume receiving ≥45 Gy less than 67% |
Volume receiving ≥60 Gy less than 33% | |
Esophagus | Volume receiving ≥55 Gy less than 35% |
Skin | Max. dose ≤70 Gy |
Functional lunga | Volume receiving ≥20 Gy less than 20% |
|  | Volume receiving ≥10 Gy less than 35% |