Table 2.
Dose constraints for plan optimization and tuning balance
| Structure | DVH parameter | Dose (Gy) | Priority |
|---|---|---|---|
| PTV_7mm | – | 30 | – |
| Hippocampus | Max dose | 14.5 | High |
| D40% | 10 | Medium | |
| D99% | 8 | High | |
| Lens | Max dose | 5 | High |
| Lacrimal gland | Max dose | 20 | Medium |
| Mean dose | 10 | Medium |
Tuning balance
Conform to Target: 30%
Dose fall-off Margin: 2.6 cm
Hot-Spot Maximum goal: 105%
Abbreviations: PTV_7mm planning target volume minus the hippocampus expanded by 7 mm in three-dimension, D99% dose to 99% of the volume, D40% dose to 40% of the volume