Table 1.
The target and the OARs constraint functions and dosimetric evaluation metrics
| Site | Target/OARs | Prescription | Constraints or objectives | Dosimetric evaluation |
|---|---|---|---|---|
| NPC | PTV70.4 | 70.4 Gy/32 F | D95 > Prescription, D2 < 110% Prescription, uniform dose = Prescription | V100, D95, D2 |
| PTV66 | 66 Gy/32 F | |||
| PTV60 | 60 Gy/32 F | |||
| PTV54 | 54 Gy/32 F | |||
| Eyes | / | Max Dose < 50 Gy | Max Dose | |
| Lens | / | Max Dose < 25 Gy | Max Dose | |
| Brainstem | / | Max Dose < 54 Gy | Max Dose | |
| Temporal lobes | / | Max Dose < 65 Gy, V60 < 1% | Max Dose | |
| Spinal cord | / | Max Dose < 45 Gy | Max Dose | |
| Optic nerves | / | Max Dose < 54 Gy | Max Dose | |
| Larynx | / | Mean Dose < 45 Gy | Mean Dose | |
| Parotid | / | Mean Dose < 26 Gy | Mean Dose, V30 | |
| Oral cavity | / | Mean Dose < 40 Gy | Mean Dose | |
| Temporomandibular joints | / | Max Dose < 70 Gy | Not evaluated | |
| Chiasm | / | Max Dose < 54 Gy | Not evaluated | |
| Rectum | PTV | 50 Gy/25 F | D95 > Prescription, D2 < 110% Prescription, uniform dose = Prescription | V100, D95, D2 |
| Femoral heads | / | V40 < 40%, Max Dose < 50 Gy | Mean Dose | |
| Bladder | / | V40 < 50% | Mean Dose, V40 |