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Dose constraints for the critical structures
| Organs at risk | Dose constraints |
|---|---|
| Brain stem | D2% < 54 Gy |
| Spinal cord | D2% < 45 Gy |
| Parotid glands | Mean dose <26 Gy or V30Gy < 50% (at least one side) |
| Eyes | D2% <50 Gy |
| Optic nerves/chiasm | D2% <54 Gy |
| Lenses | D2% <10 Gy |
| Mandible | D1 cm3 < 75 Gy |
| Temporal lobe | D1 ≤ 65 Gy |
| Larynx | Mean dose <45 Gy |
D1, the dose of the 1% volume received; D1 cm3, the dose of the 1 cm3 volume received; D2%, near maximal dose.
