Critical structures and threshold doses
| Organs | Threshold doses (5 fractions) | Minimum critical volume below threshold |
|---|---|---|
| Parallel organs | ||
| Liver | 21 Gy | 700 cc |
| Kidney | 17.5 Gy | 200 cc |
| Organs | Threshold doses (5 fractions) | Maximum point dose | Maximum critical volume above threshold |
|---|---|---|---|
| Serial organs | |||
| Spinal cord | 23 Gy | 30 Gy | 0.35 cc |
| Duodenum | 18 Gy | 32 Gy | 5 cc |
| Bowel | 19.5 Gy | 35 Gy | 5 cc |
| Stomach | 18 Gy | 32 Gy | 10 cc |
| Oesophagus | 19.5 Gy | 35 Gy | 5 cc |
| Colon | 25 Gy | 38 Gy | 20 cc |