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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