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Structure dose constraints used for IMPT, 4π, and VMAT planning
| Structure | Objectives |
|---|---|
| PTV | 100% of Rx to 100% of CTV |
| Bladder | V70 < 20% |
| V40 < 60%; V45 < 50%; V60 < 40%; V70 < 20%; V75.6 < | |
| Rectum | 10%; V78–80 < 5% |
| Femoral heads | V45 < 50%; max dose < 50Gy |
| Sigmoid colon | max dose < 50Gy |
| Small bowel | max dose < 50Gy |
| Anterior rectal wall | V70 < 40% |
