2312-2313 / 3107
0
20
40
60
80
100
120
-200
-150
-100
-50
0
50
100
150
200
% dd
distance from central axis
15 mm
75 mm
135 mm
195 mm
255 mm
Profile data of a flattened treatment beam
Off-axis beam quality
HARD
spectrum
SOFT
spectrum
Off-axis distance [mm]