Table 2 Dose volume constraints for anatomic planning and functional planning used for intensity-modulated radiotherapy (IMRT)
Anatomic planning | Functional planning | ||||||
|---|---|---|---|---|---|---|---|
Structure | Constraint type | Dose | Volume (%) | Priority | Dose | Volume (%) | Priority |
GTV | Maximum dose | 105% | 0% | 50 | 105% | 0% | 50 |
Minimum dose | 103% | 100% | 450 | 103% | 100% | 450 | |
CTV | Maximum dose | 105% | 0% | 400 | 105% | 0% | 400 |
Minimum dose | 102% | 100% | 400 | 102% | 100% | 400 | |
PTV | Maximum dose | 105% | 0% | 650 | 105% | 0% | 650 |
Minimum dose | 101% | 100% | 350 | 101% | 100% | 350 | |
Total lung | Maximum dose | 5 Gy | 30% | 200 | 5 Gy | 30% | 200 |
Maximum dose | 10 Gy | 25% | 200 | 10 Gy | 25% | 200 | |
Maximum dose | 20 Gy | 20% | 200 | 20 Gy | 20% | 200 | |
Functional lung | Maximum dose | 5 Gy | 30% | 250 | |||
Maximum dose | 10 Gy | 25% | 250 | ||||
Maximum dose | 20 Gy | 20% | 250 | ||||
Spinal cord | Maximum dose | 40 Gy | 0% | 300 | 40 Gy | 0% | 300 |
Spinal cord + 5 mm | Maximum dose | 45 Gy | 0% | 300 | 45 Gy | 0% | 300 |