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Table 4 Mean biological range shifts in mm for the two patient cases for (α/β) x  = 2 Gy and 10 Gy as deduced from the beam-eye-view range shift maps

From: Variable RBE in proton therapy: comparison of different model predictions and their influence on clinical-like scenarios

  

(α/β) x  = 2 Gy

(α/β) x  = 10 Gy

Patient

Model

90 % D presc

80 % D presc

50 % D presc

90 % D presc

80 % D presc

50 % D presc

1

LEM

D t  = 10 Gy

3.74

4.33

4.07

1.73

1.81

1.64

2

3.15

2.99

3.55

0.57

0.45

0.66

1

LEM

D t  = 40 Gy

4.75

5.42

4.97

2.30

2.44

2.10

2

4.50

4.41

4.84

1.34

1.11

1.22

1

WED

3.16

3.64

3.39

1.11

1.16

1.03

2

3.64

3.60

4.15

0.76

0.64

0.74

1

CAR

3.10

3.51

3.17

   

2

3.55

3.37

3.58

  1. Unreliable shallow profiles (>30 mm /Gy) have been excluded. Three percentage values of the prescription dose have been considered