EBRO 2017

Risk of pneumonitis - V20 : % of total lung volume minus PTV -

Median FU living pts = 24 mths Pneumonitis grade ≥ 2

V20 (%) N = 99 P @ 2 yrs < 22

0/12 4/42 4/28 8/17

0 7 13 36

22 – 31 32 – 40 > 40

Graham IJROBP 1999