Table 3 Mean differences between caculated and reference measured data, as percentage relative to the measured point for the PDD after the buildup region (d > 18 mm) and the profiles inside the field (5 mm per side inside the nominal field side rescaled according to the depth). Data represents the average on all the conditions of field size and depth. Data represents the average (of the means over all the test points of each curve) on all the conditions of field size and depth, ± the standard deviation, and the range

0.18 ± 0.41 [−0.26,0.90]

0.07 ± 0.32 [− 0.57,0.76]

0.15 ± 0.37 [− 0.21,0.82]

0.27 ± 0.19 [− 0.16,0.79]

− 0.10 ± 0.54 [− 0.54,0.86]

0.53 ± 0.56 [− 0.18,1.85]

1.11 ± 0.56 [0.57,2.11]

0.58 ± 0.65 [− 0.64,2.12]

0.11 ± 0.43 [− 0.32,0.86]

0.36 ± 0.42 [− 0.43,1.39]

0.19 ± 0.36 [− 0.18,0.83]

0.56 ± 0.52 [− 0.12,1.94]

0.15 ± 0.40 [− 0.30,0.85]

0.31 ± 0.32 [− 0.29,1.20]

0.28 ± 0.38 [− 0.07,0.96]

0.32 ± 0.21 [− 0.07,0.91]

−0.06 ± 0.59 [− 0.55,0.98]

−0.02 ± 0.35 [− 0.96,0.62]

0.72 ± 0.53 [0.24,1.66]

0.26 ± 0.25 [− 0.22,0.79]

0.16 ± 0.44 [− 0.28,0.94]

−0.02 ± 0.39 [− 0.96,0.69]

0.24 ± 0.37 [−0.22,0.86]

0.11 ± 0.30 [−0.56,0.71]

0.16 ± 0.37 [− 0.20,0.83]

0.29 ± 0.20 [− 0.18,0.78]

0.26 ± 0.45 [− 0.17,1.05]

0.03 ± 0.32 [− 0.62,0.74]

0.22 ± 0.45 [− 0.13,1.02]

0.27 ± 0.20 [− 0.15,0.81]

0.20 ± 0.40 [− 0.26,0.88]

0.08 ± 0.32 [− 0.56,0.74]

0.10 ± 0.37 [− 0.26,0.76]

0.27 ± 0.19 [− 0.13,0.82]

0.13 ± 0.39 [− 0.33,0.81]

0.06 ± 0.33 [− 0.87,0.69]

−0.09 ± 0.40 [− 0.44,0.62]

−0.01 ± 0.41 [− 1.52,0.49]

− 0.05 ± 0.27 [− 0.55,0.26]

0.10 ± 0.35 [− 0.90,0.52]

0.27 ± 0.39 [− 0.17,0.94]

− 0.04 ± 0.35 [− 0.98,0.50]

0.17 ± 0.36 [− 0.25,0.79]

− 0.04 ± 0.44 [− 1.14,0.63]

0.22 ± 0.41 [− 0.12,0.97]

0.06 ± 0.33 [− 1.23,0.60]