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Table 2 The mean and standard deviation of Dw and Dm in dose-volume indices calculated with Monte Carlo for 10 Lung IMRT cases

From: Clinical evaluation for the difference of absorbed doses calculated to medium and calculated to water by Monte Carlo method

ROI Parameter Dw(Gy) Dm(Gy) Diff(%) p
PTV65 D98% 60.7 ± 2.9 60.6 ± 2.9 −0.2 ± 0.5 0.274
D50% 68.1 ± 0.3 68.3 ± 0.3 −0.3 ± 0.3 0.106
D2% 71.1 ± 0.9 70.9 ± 1.0 0.3 ± 0.4 0.032
PTV50 D98% 49.6 ± 1.0 49.8 ± 1.0 −0.3 ± 0.3 0.004
D50% 64.2 ± 4.2 64.2 ± 4.3 −0.1 ± 0.4 0.707
D2% 70.8 ± 1.0 70.6 ± 1.1 0.2 ± 0.4 0.137
Spinal D50% 28.1 ± 9.8 28.1 ± 9.7 0.3 ± 0.3 0.001
D2% 41.2 ± 2.4 41.1 ± 2.4 0.3 ± 0.4 0.046
Lungs D50% 8.5 ± 2.9 8.5 ± 2.9 −0.2 ± 0.2 0.052
D2% 65.8 ± 3.9 66.2 ± 4.1 −0.6 ± 0.5 0.003
Esophagus D50% 40.0 ± 16.9 40.0 ± 16.9 −0.1 ± 0.6 0.718
D2% 60.2 ± 2.9 60.7 ± 3.1 −0.7 ± 0.5 0.004
Heart D50% 6.1 ± 7.0 6.1 ± 7.0 1.1 ± 0.5 0.010
D2% 51.0 ± 10.7 50.5 ± 10.5 0.6 ± 0.6 0.001