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Table 3 Comparison of dose parameters for the small bowel between Tomotherapy and 3-dimensional conformal radiation therapy

From: A comparison of dosimetric parameters between tomotherapy and three-dimensional conformal radiotherapy in rectal cancer

Values

Tomotherapy, mean (Gy)

3D-CRT, mean (Gy)

p value

V25Gy (%)

0.10 ± 0.24

10.92 ± 12.63

< 0.001

V22.5Gy (%)

0.93 ± 1.10

19.88 ± 15.73

< 0.001

V20Gy (%)

3.79 ± 6.23

25.32 ± 16.44

< 0.001

V17.5Gy (%)

8.19 ± 12.06

33.10 ± 18.71

< 0.001

V15Gy (%)

13.79 ± 20.65

30.28 ± 19.16

< 0.001

V10Gy (%)

30.28 ± 13.97

48.55 ± 19.03

0.001

V5Gy (%)

73.74 ± 22.82

77.30 ± 15.64

0.568

  1. V nGy percentage of the volume receiving radiation ≥ n Gy.
  2. 3D-CRT 3-dimensional conformal radiation therapy.