Table 2 Comparison of the doses to OARs (Plan A: 1ARC/Plan B: 2TARC/PlanC: 4IMRT, paried T test).

From: Advantages of a technique using two 50 degree arcs in simultaneous integrated boost radiotherapy for left-sidebreast cancer

   

Plan A

PlanB

Plan C

P value

A Vs B

B Vs C

A Vs C

Lung_Right

Dmean(Gy)

mean ± SD

2.58 ± 0.54

1.39 ± 0.18

1.15 ± 0.14

0.000

0.000

0.000

max/min

3.33/1.77

1.74/1.21

1.34/0.95

Spinal cord

Dmax(Gy)

mean ± SD

3.60 ± 0.86

2.16 ± 1.13

1.25 ± 0.17

0.000

0.000

0.000

max/min

4.80/2.15

5.07/1.24

1.57/1.01

Breast_Right

Dmean(Gy)

mean ± SD

2.60 ± 0.69

1.74 ± 0.38

1.51 ± 0.54

0.000

0.028

0.000

max/min

4.08/1.82

2.38/1.42

2.50/1.06

Dmax(Gy)

mean ± SD

5.73 ± 1.66

4.95 ± 1.32

5.38 ± 2.06

0.023

0.289

0.246

max/min

9.51/4.61

8.39/3.31

9.67/3.15

Lung_Left

V5(%)

mean ± SD

41.22 ± 8.86

38.18 ± 4.45

41.73 ± 6.12

0.206

0.092

0.852

max/min

56.5/33.6

46.4/33.5

51.7/34.6

V10(%)

mean ± SD

23.53 ± 4.52

23.65 ± 3.68

28.10 ± 5.22

0.895

0.008

0.004

max/min

31/18.1

30.5/19.3

36.2/22.9

V20(%)

mean ± SD

13.83 ± 2.93

15.28 ± 2.92

17.54 ± 4.16

0.047

0.035

0.008

max/min

18.5/9.6

20.5/11.5

26.2/12.1

Dmean(Gy)

mean ± SD

9.23 ± 1.51

9.52 ± 1.63

10.20 ± 1.90

0.348

0.036

0.009

max/min

11.67/7.21

12.92/7.47

13.81/7.68

Heart

V5(%)

mean ± SD

28.97 ± 9.62

23.84 ± 8.33

24.35 ± 7.29

0.070

0.936

0.225

max/min

49.5/17.4

35.5/10.6

35.1/12.3

V10(%)

mean ± SD

11.43 ± 4.49

10.72 ± 2.90

15.42 ± 5.34

0.702

0.012

0.055

max/min

19.1/7

15.2/6.58

21.9/7.3

V20(%)

mean ± SD

4.71 ± 1.72

5.41 ± 2.02

8.30 ± 3.89

0.525

0.008

0.003

max/min

8.4/2.9

8.1/2.7

12.9/4.3

Dmean(Gy)

mean ± SD

5.83 ± 0.86

5.38 ± 1.01

5.87 ± 1.27

0.047

0.035

0.917

max/min

7.33/5.05

6.81/4.18

8.32/4.20

Body

V5(%)

mean ± SD

22.80 ± 4.05

17.04 ± 3.12

17.21 ± 2.67

0.000

0.784

0.000

max/min

29.19/17.72

21.87/13.43

20.35/13.93

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