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Table 1 Dosimetric parameters of PTV and OARs for 10 cases of left breast cancer after radical mastectomy

From: Dosimetric effects of supine immobilization devices on the skin in intensity-modulated radiation therapy for breast cancer: a retrospective study

Parameter

Plan+

Plan-

\( \overline{D} \)(95%CI)

p

PTV

 Coverage Index

94.49 ± 1.08

95.01 ± 0.43

−0.52(− 1.18, 0.15)

0.112

 D2%

54.14 ± 0.92

54.60 ± 0.45

−0.46(− 1.12, 0.19)

0.145

 D98%

46.59 ± 1.92

47.07 ± 1.69

−0.48(− 1.13, 0.16)

0.124

 Dmean

52.46 ± 0.36

52.51 ± 0.31

−0.05(− 0.19, 0.10)

0.501

 HI

1.09 ± 0.02

1.08 ± 0.01

0.006(0.001,0.011)

0.024

 CI

0.65 ± 0.21

0.65 ± 0.22

0(−0.009, 0.005)

0.555

Skin

 Dmean

40.39 ± 3.73

39.89 ± 3.76

0.50(0.11, 0.89)

0.018

 V5

98.18 ± 1.78

97.64 ± 2.14

0.54(0.12,0.97)

0.018

 V10

94.28 ± 3.77

93.01 ± 4.52

1.27(0.16, 2.49)

0.030

 V20

85.71 ± 7.46

84.86 ± 7.61

0.85(0.17, 1.53)

0.020

 V30

77.55 ± 8.79

76.25 ± 8.71

1.30(0.21, 2.40)

0.025

 V40

64.91 ± 11.61

63.62 ± 11.51

1.29(0.15, 2.43)

0.031

Left Lung

 Dmean

15.32 ± 1.627

15.36 ± 1.82

−0.03(−0.42, 0.35)

0.845

 V5

61.90 ± 5.15

62.11 ± 4.99

−0.21(− 1.84, 1.43)

0.783

 V10

44.11 ± 4.43

43.84 ± 4.90

0.26(− 1.14, 1.66)

0.682

 V20

29.12 ± 3.85

29.25 ± 4.35

−0.14(−1.16, 0.88)

0.767

 V30

19.98 ± 4.01

20.19 ± 4.31

−0.21(− 0.91, − 0.49)

0.514

Right Lung

 Dmean

0.94 ± 0.26

0.94 ± 0.23

−0.001(− 0.05,0.05)

0.963

 V5

20.08(14.30,38.73)

20.56(13.37,40.21)

−0.08(− 0.37,0.20)

0.515

 V15

0(0,0.01)

0(0,0.025)

−0.01(− 0.02,0.01)

0.235

Heart

 Dmean

7.45 ± 1.55

7.21 ± 1.40

0.24(−0.09, 0.57)

0.134

 Dmax

51.74 ± 7.58

51.64 ± 7.71

0.11(−0.32, 0.53)

0.589

 V5

58.64 ± 6.75

56.41 ± 7.87

2.23(−1.40,5.87)

0.198

 V25

3.60 ± 3.61

3.56 ± 3.63

0.04(−0.10,0.19)

0.526

LAD

 Dmean

37.93 ± 15.14

38.00 ± 14.86

−0.06(−0.73, 0.61)

0.839

 Dmax

3.51 ± 3.41

3.45 ± 3.38

0.06(−0.07, 0.19)

0.319

 V5

100(98.32,100)

100(98.14,100)

− 0.17(−5.72,5.38)

0.948

 V30

13.48(0,45.85)

12.91(0,46.0)

0.36(− 0.09,0.80)

0.103

 V40

1.91(0,34.55)

1.93(0,34.63)

−0.46(−1.70,0.79)

0.428

Left Vessile

 Dmean

20.65 ± 10.30

20.65 ± 10.38

0(−3.07,3.07)

0.998

 V5

72.82 ± 13.30

69.63 ± 16.16

3.19(−1.01,7.39)

0.120

 V23

5.62 ± 5.53

5.65 ± 5.66

−0.03(− 0.27,0.21)

0.770

Right breast

 Dmean

2.14 ± 1.13

2.21 ± 1.14

−0.07(− 0.27, 0.13)

0.448

 D2%

14.76 ± 10.39

15.52 ± 10.61

−0.76(−2.24,0.72)

0.275

 V5

8.62 ± 6.62

9.32 ± 6.78

−0.70(−2.14,0.74)

0.299

Spinal cord

 Dmax

17.17 ± 5.58

17.53 ± 6.25

−0.36(− 1.43,0.71)

0.464

 D2%

13.03 ± 4.56

13.25 ± 4.56

−0.22(− 0.75,0.31)

0.375

Esophagus

 Dmax

53.60 ± 3.58

53.73 ± 2.83

−0.14(−1.02,0.75)

0.736

 V5

59.22 ± 18.83

54.55 ± 18.17

4.67(−4.03,13.37)

0.256

Thyroid

 Dmean

32.14 ± 3.92

32.27 ± 3.85

−0.13(− 0.63,0.38)

0.593

 Dmax

54.68 ± 0.75

54.77 ± 1.16

−0.09(− 0.70,0.52)

0.752

 V5

99.68 ± 0.79

99.56 ± 0.83

0.12(−0.31,0.54)

0.554

Larynx

 Dmax

42.62 ± 8.54

42.72 ± 8.29

−0.10(−1.33,1.13)

0.858

 V5

90.05 ± 13.60

88.24 ± 15.09

1.81(−1.41,5.04)

0.235