593 / 1109
lung cancer
30% patients with low
grade tumors (now
treated with SBRT with
few mm margins), have
spread at 15 mm distance
Having dose there may be essential!
100%
50%
25%
Slide courtesy of Gilhuijs and Stroom, NKI
N=32
0
10
20
30
40
50
60
70
80
90
100
0 5 10 15 20 25 30 35 40 45
distance from GTV [mm]
% cases with extensions
Deformation
corrected