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Table 3 The mean and standard deviation of Dw and Dm in dose-volume indices calculated with Monte Carlo for 10 bone target 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

PTV25

D98%

25.7 ± 0.9

24.9 ± 1.0

3.0 ± 1.2

0.002

D50%

27.2 ± 0.3

26.2 ± 0.4

3.5 ± 1.4

<  0.001

D2%

28.2 ± 0.4

27.0 ± 0.4

4.4 ± 1.9

<  0.001

PTV20

D98%

21.6 ± 0.9

21.1 ± 1.0

2.2 ± 0.7

0.019

D50%

25.2 ± 1.7

24.4 ± 1.7

2.8 ± 0.7

<  0.001

D2%

27.9 ± 0.4

26.8 ± 0.3

3.8 ± 1.7

<  0.001

Spinal

D50%

14.4 ± 9.9

14.3 ± 9.9

0.4 ± 0.5

0.025

D2%

24.4 ± 1.4

24.3 ± 1.3

0.5 ± 0.3

0.001

Lungs

D50%

1.4 ± 1.4

1.4 ± 1.4

0.0 ± 0.3

0.999

D2%

14.2 ± 5.7

14.3 ± 5.7

−0.6 ± 0.6

0.011

Esophagus

D50%

5.1 ± 6.6

5.1 ± 6.6

−0.6 ± 1.0

0.950

D2%

21.0 ± 3.6

21.0 ± 3.6

0.1 ± 0.4

0.453