1139 / 1416
Plateau
(13 keV/µm)
Set-up Photons Carbon Ions Measured Calculated *
D50 [Gy] D50 [Gy] RBE RBE
1 Fx
24.5
±0.8
17.1
±0.8
1.43
±0.08
1.14
(1.12-1.16)
2 Fx
34.2
±0.7
24.9
±0.7
1.37
±0.05
1.19
(1.17-1.21)
6 Fx
57.0
±4.0
42.8
±1.5
1.33
±0.10
1.37
(1.35-1.39)
18 Fx 88.6
±2.0
62.2
±3.5
1.42
±0.09
1.72
(1.65-1.77)
Peak (125±25 keV/µm)
1 Fx
24.5
±0.8
13.9
±0.8
1.76
±0.12
1.28
(1.26-1.30)
2 Fx
34.2
±0.7
15.8
±0.7
2.16
±0.11
1.61
(1.57-1.65)
6 Fx
57.0
±4.0
19.2
±0.2
2.97
±0.21
2.35
(1.25-2.44)
18 Fx 88.6
±2.0
17.7
±1.3
5.01
±0.37
3.80
(3.50-4.20)
Results
Clear frac)ona)on
effect in the
plateau
,
which allows sparing
of normal )ssues.
RBE constant
, when
number of frac)ons
increase