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The dose constraints for the two IMRT plans.
| Structure | Dose-Volume constraints |
|---|---|
| PTV | Dmax ≤ 110% |
| V95% > 95% | |
| 47.5 Gy ≤ Dmean ≤ 52.5 Gy | |
| Left Lens | Dmax ≤ 5 Gy |
| Right Lens | Dmax ≤ 8 Gy |
| Eye unilateral | Dmax ≤ 40 Gy |
| Parotid unilateral | Dmax ≤ 45 Gy |
| V18Gy ≤ 33% | |
| Dmean ≤ 5Gy | |
| Ear Middle unilateral | Dmax ≤ 45 Gy |
PTV = Planning target volume, V95% = volume receiving 95% of the prescription dose, D95% = dose received by 95% PTV volume, Vd = the volume of specific organ which receiving a dose of d Gy.
