Median FU living pts = 24 mths
Pneumonitis grade ≥ 2
Risk of pneumonitis
- V20 : % of total lung volume minus PTV -
V20 (%)
N = 99 P @ 2 yrs
< 22
22 – 31
32 – 40
> 40
0/12
4/42
4/28
8/17
0
7
13
36
Graham IJROBP 1999