Table 1 Critical organ dose-volume limits for stereotactic ablative radiotherapy to 50 Gy given in 4 fractions

Esophagus

D_max

35 Gy

≤ 1 cm³

30 Gy

≤ 5 cm³

20 Gy

Brachial plexus

D_max

40 Gy

≤ 1 cm³

35 Gy

≤ 5 cm³

30 Gy

Trachea

D_max

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*

V_{20 Gy(RBE)}

< 20% of total lung volume

V_10Gy(RBE)

< 30% of total lung volume

V_5Gy(RBE)

< 40% of total lung volume

Major vessels

D_max

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

D_max

25 Gy

≤ 5 cm³

20 Gy