Table 1.
Dose constraints employed in the optimization process during treatment planning.
| Structure | Parameter | Goal |
|---|---|---|
| PTV | D95% | ≥95% |
| Dmax | ≤107% | |
| Bladder | V30 | <50% |
| V40 | <35% | |
| V50 | <5% | |
| Large Bowel | V30 | <200 cm3 |
| V35 | <150 cm3 | |
| V40 | <20 cm3 | |
| Dmax | <50 Gy | |
| Small Bowel | V30 | <200 cm3 |
| V35 | <150 cm3 | |
| V40 | <20 cm3 | |
| Dmax | <50 Gy | |
| External Genitalia | V20 | <50% |
| V30 | <35% | |
| V40 | <5% | |
| Femoral Heads | V30 | <50% |
| V40 | <35% | |
| V50 | <5% | |
| Active PBM | V10 | <90% |
| V20 | <75% | |
| Active LSBM | V40 | <41% |
| Dmean | <32 Gy |
Legend: PTV: planning target volume; PBM: pelvic bone marrow; LSBM: lumbar-sacral bone marrow.