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Table 3 Dosimetric parameters for small bowel, rectum, bladder and femoral heads

From: Optimal dose limitation strategy for bone marrow sparing in intensity-modulated radiotherapy of cervical cancer

Volume

IMRT (N)

IMRT (BM)

IMRT (OC)

IMRT (OC + LS)

Small Bowel

 V10 (%)

84.83 ± 11.28

79.19 ± 24.78

78.69 ± 24.67

78.75 ± 24.69

 V20 (%)

72.19 ± 11.65

66.44 ± 21.92

68.90 ± 22.21

65.29 ± 21.72

 V30 (%)

50.96 ± 12.88

49.13 ± 18.04

51.03 ± 17.64

47.93 ± 17.64

 V40 (%)

28.30 ± 10.79

26.44 ± 12.75

27.65 ± 12.41

26.38 ± 12.09

 V50 (%)

7.87 ± 4.13

7.80 ± 4.79

7.96 ± 5.01

8.53 ± 4.99

Rectum

 V10 (%)

96.80 ± 4.96

96.72 ± 5.23

96.69 ± 5.25

96.70 ± 5.22

 V20 (%)

90.29 ± 5.69

89.30 ± 5.94

90.06 ± 5.93

89.45 ± 6.14

 V30 (%)

74.09 ± 5.92

74.30 ± 4.90

74.36 ± 4.71

73.72 ± 3.84

 V40 (%)

53.89 ± 7.45

54.45 ± 6.40

54.57 ± 6.77

54.60 ± 4.36

 V50 (%)

25.27 ± 8.17

26.07 ± 8.26

26.01 ± 8.32

27.26 ± 7.70

Bladder

 V30 (%)

95.40 ± 4.14

92.25 ± 4.70

91.00 ± 5.59

88.57 ± 5.97

 V40 (%)

72.03 ± 5.43

66.47 ± 10.30

63.63 ± 11.58

61.53 ± 11.81

 V50 (%)

29.49 ± 13.27

29.39 ± 13.96

29.45 ± 13.48

30.05 ± 13.94

Femoral head (left)

 V30 (%)

15.63 ± 4.29

10.03 ± 3.94*

8.37 ± 3.69

7.71 ± 3.78

 V40 (%)

5.98 ± 3.35

2.86 ± 2.60*

2.51 ± 2.52

2.39 ± 2.48

 V50 (%)

0.46 ± 0.75

0.34 ± 0.70

0.38 ± 0.72

0.39 ± 0.69

Femoral head (right)

 V30 (%)

14.96 ± 4.15

9.19 ± 3.29*

7.39 ± 2.97

7.20 ± 3.37

 V40 (%)

5.20 ± 2.90

2.43 ± 2.08*

2.01 ± 2.00

1.98 ± 1.99

 V50 (%)

0.34 ± 0.62

0.20 ± 0.43

0.30 ± 0.59

0.32 ± 0.59

  1. Abbreviations: IMRT (N) without bone marrow as avoidance structures, IMRT (BM) whole bone marrow as avoidance structures, IMRT (OC) os coxae as avoidance structures, IMRT (OC + LS) Both os coxae and lumbosacral spine as avoidance structures, Vn percentage of volume receiving n Gy
  2. *p value < 0.05 while comparing IMRT (N) plan with other three plans
  3. †p value < 0.05 while comparing IMRT (BM) plan with IMRT (OC) and IMRT (OC + LS) plans, respectively