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Table 1 Mean values and standard deviations (n = 10) of the dosimetric parameters for the different techniques studied

From: Tangential volumetric modulated arc therapy technique for left-sided breast cancer radiotherapy

 

tVMAT

cVMAT

tIMRT

FinF

PTV

    

D1cm3 (Gy)

53.4 ± 0.5

53.3 ± 0.4

53.7 ± 0.5

53.5 ± 0.6

V47.5 (%)

97.8 ± 0.8

98.1 ± 1.0

96.3 ± 2.0

91.4 ± 2.4

HI

0.10 ± 0.01

0.10 ± 0.01

0.12 ± 0.02

0.14 ± 0.01

CI

0.50 ± 0.03

0.50 ± 0.04

0.45 ± 0.05

0.47 ± 0.09

Lung, Ipsilateral

    

V20 (%)

18.1 ± 5.3

15.3 ± 4.6

21.6 ± 4.0

21.4 ± 3.7

V10 (%)

25.3 ± 5.6

23.4 ± 5.6

26.2 ± 4.3

25.7 ± 3.8

V5 (%)

36.9 ± 5.4

35.5 ± 5.6

33.3 ± 4.3

32.0 ± 3.6

Mean dose (Gy)

9.6 ± 2.1

8.7 ± 1.7

10.9 ± 1.8

10.4 ± 1.5

Lung, Contralateral

    

Mean dose (Gy)

0.9 ± 0.1

1.6 ± 0.7

0.7 ± 0.1

0.7 ± 0.1

Heart

    

V30 (%)

5.7 ± 6.0

3.4 ± 3.9

13.9 ± 6.8

15.2 ± 6.9

V25 (%)

8.2 ± 6.9

5.0 ± 5.3

15.4 ± 7.1

16.4 ± 7.4

V2 (%)

60.8 ± 18.8

68.4 ± 22.3

61.3 ± 14.4

57.9 ± 14.4

Mean dose (Gy)

6.3 ± 3.0

5.5 ± 2.9

9.1 ± 3.4

9.1 ± 3.5

LAD

    

V30 (%)

43.1 ± 29.5

32.0 ± 27.3

67.8 ± 19.9

79.7 ± 8.1

V25 (%)

55.0 ± 27.8

40.3 ± 28.4

72.2 ± 15.1

81.2 ± 7.5

Mean dose (Gy)

24.3 ± 8.0

20.4 ± 8.7

34.4 ± 7.0

37.9 ± 3.6

Breast, Contralateral

    

V2 (%)

10.2 ± 7.0

53.0 ± 27.1

11.1 ± 5.6

7.0 ± 4.8

Mean dose (Gy)

1.2 ± 0.3

2.6 ± 1.2

1.0 ± 0.4

1.0 ± 0.3

Normal tissue (Body-PTV)

    

V53.5 (cm3)

0.9 ± 1.1

0.4 ± 0. 5

8.5 ± 15.6

1.9 ± 4.1

V2 (%)

20.3 ± 4.6

30.4 ± 8.3

17.3 ± 2.8

15.9 ± 3.4

Mean dose (Gy)

3.3 ± 0.5

3.8 ± 0.6

3.3 ± 0.5

3.4 ± 1.1

Body

    

Integral Dose (Gydm3)

105.3 ± 43.4

113.5 ± 43.8

105.6 ± 43.8

99.3 ± 46.5