2
4
8
6
10
Target
Flattening filter
Coll jaws
Primary coll.
T
P
F
C
Resulting energy fluence spectra at isocenter
(in log scale)
Dublin 2018
Sheikh-Bagheri
et al
[4]
Energy /MeV
log Photon energy fluence
2 4
10
6 8
12 14 16
1
4 3 2
6 5