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Planning Objectives for Critical Structures.
| OARs | Brain stem | D1%<54Gy |
| Spinal cord | D1%<45Gy | |
| Optic nerves | D1%<54Gy | |
| Chiasm | D1%<54Gy | |
| Lens | D1%<8Gy | |
| Cochlea | Dmean<45Gy | |
| Parotid | Dmean<26 Gy or at least 50% of one side will receive <30 Gy | |
| Temporal lobe | D1%≤60Gy or D1cc≤65Gy |
Abbreviation: OARs, organs at risk.
