Table 1.
Critical organ dose-volume limits for stereotactic ablative radiotherapy to 50 Gy given in 4 fractions
| Organ, Limit, and Volume | Maximum dose limits |
|---|---|
| Esophagus | |
| Dmax |
35 Gy |
| ≤ 1 cm3 |
30 Gy |
| ≤ 5 cm3 |
20 Gy |
| Brachial plexus | |
| Dmax |
40 Gy |
| ≤ 1 cm3 |
35 Gy |
| ≤ 5 cm3 |
30 Gy |
| Trachea | |
| Dmax |
45 Gy |
| ≤ 1 cm3 |
35 Gy |
| ≤ 5 cm3 |
30 Gy |
| Main bronchus and bronchial tree | |
| ≤ 1 cm3 |
40 Gy |
| ≤ 5 cm3 |
35 Gy |
| Heart | |
| ≤ 1 cm3 |
40 Gy |
| ≤ 5 cm3 |
35 Gy |
| Total lung volume* | |
| V20 Gy(RBE) |
< 20% of total lung volume |
| V10Gy(RBE) |
< 30% of total lung volume |
| V5Gy(RBE) |
< 40% of total lung volume |
| Major vessels | |
| Dmax |
45 Gy |
| ≤ 1 cm3 |
40 Gy |
| ≤ 5 cm3 |
35 Gy |
| Skin | |
| ≤ 1 cm3 |
35 Gy |
| ≤ 5 cm3 |
30 Gy |
| Chest wall | |
| ≤ 10 cm3 |
45 Gy |
| ≤ 30 cm3 |
35 Gy |
| Spinal cord | |
| Dmax |
25 Gy |
| ≤ 5 cm3 | 20 Gy |
*Defined as right plus left lungs minus the gross tumor volume.