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. 2016 Apr 15;43(5):2374–2386. doi: 10.1118/1.4945697

TABLE III.

15 MV Varian collected reference data. Median values are given with the standard deviation in parentheses. N is the number of measurements.

Parameter/Class Base class TB-flat
N 100 14
PDD 5 cm   0.943 (0.003) 0.946 (0.002)
10 cm   0.767 (0.003) 0.769 (0.001)
15 cm   0.617 (0.003) 0.620 (0.001)
20 cm   0.496 (0.002) 0.499 (0.001)
N 97 14
Output factors 6 × 6 cm2 0.959 (0.005) 0.953 (0.003)
15 × 15 cm2 1.030 (0.004) 1.035 (0.002)
20 × 20 cm2 1.050 (0.006) 1.060 (0.003)
30 × 30 cm2 1.075 (0.007) 1.085 (0.005)
N 100 13
Off-axis factors 5 cm left 1.038 (0.008) 1.036 (0.004)
10 cm avg 1.049 (0.008) 1.045 (0.004)
15 cm left 1.061 (0.010) 1.056 (0.004)
N 18 13
IMRT output factors 2 × 2 cm2 0.831 (0.006) 0.815 (0.006)
3 × 3 cm2 0.893 (0.008) 0.885 (0.004)
4 × 4 cm2 0.929 (0.008) 0.924 (0.002)
6 × 6 cm2 0.965 (0.007) 0.964 (0.002)
N 7 7
SBRT output factors 2 × 2 cm2 0.799 (0.004) 0.784 (0.006)
3 × 3 cm2 0.865 (0.002) 0.855 (0.004)
4 × 4 cm2 0.902 (0.003) 0.892 (0.004)
6 × 6 cm2 0.949 (0.003) 0.938 (0.003)
N 27 11
EDW factors 45° 0.814 (0.003) 0.811 (0.002)
60° 0.716 (0.003) 0.713 (0.003)
45° (15 × 15,15) 0.720 (0.001) 0.718 (0.003)
N 44
Upper wedge factors 45° 0.523 (0.003) N/A
60° 0.434 (0.003)
45° (15 × 15,15) 0.529 (0.003)