Table 1.
Dose-volume constraints for target volumes and OARs.
| Structures | Objectives |
|---|---|
| PTV1 and PTV2 | D95% ≥ PD |
| D2% < 107% | |
| CTV1 and CTV2 | D98% ≥ PD |
| D2% < 107% | |
| Rectum | V50Gy < 60% |
| V35Gy < 65% | |
| V25Gy < 70% | |
| V15Gy < 75% | |
| Bladder | V50Gy < 65% |
| V35Gy < 70% | |
| V25Gy < 75% | |
| V15Gy < 80% | |
| Bowel cavity | V30Gy < 40% |
| Femurs | V5Gy < 50% |
PTV, planning target volume; CTV, clinical target volume; OARs, organs at risk; PD, prescription dose; Dx, dose received by target at a defined volume (x) in percentage; Vx, volume of OAR receiving a defined dose (x) in Gray.