Table 2 Dose constraints used in treatment planning
Organ | Dose volume parameters | Organ | Dose volume parameters |
|---|---|---|---|
Lens | Dmax < 7Gy | Heart | Dmean < 26Gy |
Eye | Dmax < 50Gy | V30 < 50% | |
Dmean < 35Gy | Liver | Dmean < 30Gy | |
Optic nerve | Dmax < 54Gy | 1/3 volume of liver avoid irradiation | |
Brain stem | Dmax < 54Gy | Kidney | Dmean < 18Gy |
Parotid | V30 < 50% | V12 < 55% | |
Dmean < 26Gy | V20 < 32% | ||
Spinal cord | Dmax < 40Gy | Intestine | V40 < 30% |
Esophagus | V35 < 50% | Bladder | V30 < 50% |
Dmean < 34Gy | Femoral Head | V20 < 50% | |
Lung | V5 < 70% | V30 < 15% | |
V10 < 50% | Rectum | V30 < 50% | |
V20 < 30% | V60 < 35% | ||
Dmean < 15Gy | V70 < 20% |