Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The dose–volume constraints of normal tissues in NPC.
| Structures | Dose–volume constraints |
|---|---|
| Brainstem | Dmax < 54 Gy |
| Spinal cord | Dmax < 45 Gy |
| Optic nerves | Dmax < 54 Gy or D1 < 60Gy |
| Optic chiasm | Dmax < 54 Gy |
| Lens | Dmax < 8 Gy |
| Eyes | Dmax < 40 Gy |
| Pituitary | Dmax < 60 Gy |
| Mandible | Dmax < 70 Gy |
| TMJ | Dmax < 70 Gy |
| Brachial plexus | Dmax < 66 Gy |
| Oral cavity | V40 < 40% |
| Parotid gland | V30 < 50% |
| Temporal lobes | Dmax < 60 Gy or D1 < 65Gy |
| Larynx | V45 < 40% |
| Esophagus | V45 < 40% |
