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Table 3 Comparision of dosimetric metrics of OARs as a function of plan modality (\(\overline{x}\) ± SD)

From: The choice of multi-beam IMRT for whole breast radiotherapy in early-stage right breast cancer

Metric

3DCRT

for-IMRT

inv-IMRT

HT

VMAT

p-value

Heart (RB)

 Dmax (Gy)

2.73 ± 0.56

2.73 ± 0.52

17.80 ± 5.46

15.65 ± 3.38

12.87 ± 2.15

<0.001

 Dmean (Gy)

0.95 ± 0.17

0.93 ± 0.15

5.10 ± 1.20

3.74 ± 0.92

4.99 ± 0.76

<0.001

 V5 (%)

0.0 ± 0.0

0.0 ± 0.0

39.50 ± 19.02

27.60 ± 15.16

38.00 ± 12.10

<0.001

 V10 (%)

0.0 ± 0.0

0.0 ± 0.0

7.00 ± 4.26

3.50 ± 3.42

3.90 ± 2.95

<0.001

LAD (RB)

 Dmax (Gy)

1.00 ± 0.13

1.01 ± 0.16

8.10 ± 3.42

6.54 ± 1.85

4.63 ± 0.83

<0.001

 Dmean (Gy)

0.85 ± 0.20

0.81 ± 0.10

5.05 ± 1.56

3.49 ± 1.20

3.71 ± 0.67

<0.001

Ipsilateral lung

 Dmax (Gy)

51.50 ± 1.82

50.56 ± 1.34

45.96 ± 2.52

43.13 ± 4.32

44.26 ± 3.15

<0.001

 Dmean (Gy)

7.66 ± 2.50

7.49 ± 2.44

12.18 ± 3.21

4.93 ± 1.45

11.71 ± 3.47

<0.001

 V5 (%)

19.80 ± 7.12

12.93 ± 4.70

79.92 ± 13.02

49.40 ± 15.51

76.38 ± 20.37

<0.001

 V10 (%)

15.21 ± 5.05

15.22 ± 5.22

44.26 ± 20.71

20.92 ± 6.58

40.30 ± 16.07

<0.001

 V20 (%)

12.99 ± 4.60

12.93 ± 4.70

15.64 ± 7.37

6.91 ± 2.03

14.69 ± 5.52

0.005

Contralateral lung

 Dmax (Gy)

1.52 ± 0.38

1.58 ± 0.37

11.67 ± 3.30

11.49 ± 4.22

6.25 ± 1.30

<0.001

 Dmean (Gy)

0.35 ± 0.08

0.35 ± 0.08

3.69 ± 1.13

2.46 ± 0.96

2.50 ± 0.57

<0.001

 V5 (%)

0.0 ± 0.0

0.0 ± 0.0

25.75 ± 18.43

14.16 ± 11.82

2.46 ± 4.55

<0.001

 V10 (%)

0.0 ± 0.0

0.0 ± 0.0

1.73 ± 2.27

1.41 ± 2.43

0.0 ± 0.0

0.016

Contralateral breast

 Dmax (Gy)

2.53 ± 0.91

2.66 ± 0.99

7.90 ± 2.76

9.68 ± 1.88

9.58 ± 2.99

<0.001

 Dmean (Gy)

0.54 ± 0.14

0.53 ± 0.14

2.69 ± 0.78

2.96 ± 0.57

2.19 ± 0.49

<0.001

 V3 (%)

0.16 ± 0.31

0.17 ± 0.36

27.87 ± 15.98

48.72 ± 15.42

17.80 ± 8.79

<0.001

 V5 (%)

0.0 ± 0.0

0.0 ± 0.0

6.25 ± 6.98

14.54 ± 7.06

3.84 ± 3.87

<0.001

Body-PTV

 V3 (%)

7.81 ± 3.35

7.86 ± 3.05

51.98 ± 11.50

39.30 ± 10.30

40.77 ± 9.68

<0.001

 V5 (%)

5.76 ± 2.38

5.73 ± 2.23

34.57 ± 9.10

27.19 ± 8.31

25.79 ± 7.98

<0.001

 V10 (%)

4.53 ± 1.96

4.52 ± 1.88

15.32 ± 4.46

13.86 ± 4.66

11.69 ± 4.11

<0.001

 V20 (%)

3.45 ± 1.62

3.41 ± 1.59

4.91 ± 1.68

5.95 ± 2.24

4.67 ± 1.91

0.016

 V30 (%)

2.80 ± 1.43

2.77 ± 1.42

1.92 ± 0.88

2.39 ± 1.07

1.66 ± 0.85

0.124

  1. D max max dose, D mean mean dose, V x volume (%) receiving x dose (Gy) or higher