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Table 1 Comparison of dose parameters for the planning target volume between Tomotherapy and 3-dimensional conformal radiation therapy

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

Parameters

Tomotherapy

3D-CRT

p value

Mean dose (Gy)

25.58 ± 0.35

25.19 ± 0.74

0.043

V23.25Gy (%)

99.45 ± 0.57

99.37 ± 0.86

0.225

V26.25Gy (%)

10.03 ± 25.66

10.28 ± 7.52

0.485

V27.5Gy (%)

0.26 ± 0.87

0.10 ± 0.12

0.414

Dmin (Gy)

17.97 ± 1.93

22.05 ± 2.76

< 0.001

Dmax (Gy)

27.28 ± 0.73

27.18 ± 0.38

0.588

RCI

1.01 ± 0.00

1.00 ± 0.00

0.120

rDHI

0.70 ± 0.01

0.83 ± 0.04

< 0.001

  1. RCI radiation conformality index.
  2. rDHI radical dose homogeneity index.
  3. D min minimum dose irradiated to the planning target volume.
  4. D max maximum dose irradiated to the planning target volume.
  5. V nGy percentage of the volume receiving radiation ≥ n Gy.
  6. 3D-CRT 3-dimensional conformal radiation therapy.