Table 1 Summary of the dose differences calculated by the AAA and AXB algorithm with 2.5 and 1 mm CGS for the 6XFFF beam

PTV_lung

D_min

Gy

44.0 ± 0.8

42.0 ± 1.3^a

44.6 ± 0.6

42.2 ± 2.0^b

D_max

Gy

57.2 ± 1.7

57.6 ± 1.7

58.5 ± 1.5

58.0 ± 2.0

D_mean

Gy

51.9 ± 0.8

51.2 ± 1.2^a

52.9 ± 0.8

51.6 ± 1.2^b

PTV_soft

D_min

Gy

46.9 ± 3.1

46.5 ± 3.3

46.6 ± 2.5

46.5 ± 3.0

D_max

Gy

57.2 ± 1.8

57.4 ± 2.1

58.1 ± 2.1

57.9 ± 1.9

D_mean

Gy

53.1 ± 1.8

52.9 ± 1.7

52.9 ± 2.0

52.9 ± 1.7

Aorta

D_max

Gy

12.9 ± 9.7

12.6 ± 9.8^a

12.9 ± 9.6

12.4 ± 9.3^b

D_mean

Gy

2.6 ± 2.2

2.5 ± 2.1^a

2.6 ± 2.2

2.5 ± 2.1^b

Bronchial tree

D_max

Gy

14.3 ± 10.4

14.4 ± 10.6

14.4 ± 10.4

14.4 ± 10.6

D_mean

Gy

3.5 ± 2.5

3.5 ± 2.5

3.6 ± 2.6

3.5 ± 2.5

Chest wall

V₄₅

%

1.2 ± 1.9

1.1 ± 1.7

1.3 ± 1.9

1.2 ± 1.8^b

V₃₀

%

7.3 ± 8.9

7.0 ± 8.4

7.4 ± 8.9

7.0 ± 8.4^b

V₂₀

%

36.3 ± 31.2

34.1 ± 29.9^a

37.2 ± 31.3

34.8 ± 30.1

D_mean

Gy

5.5 ± 2.4

5.4 ± 2.4^a

5.5 ± 2.4

5.4 ± 2.4^b

Spinal cord

D_max

Gy

8.0 ± 2.9

7.5 ± 2.7^a

8.2 ± 2.9

7.7 ± 2.8^b

D_mean

Gy

1.5 ± 0.5

1.4 ± 0.4^a

1.5 ± 0.5

1.4 ± 0.4^b

Esophagus

D_max

Gy

9.2 ± 3.4

8.9 ± 3.4^a

9.3 ± 3.4

8.9 ± 3.4^b

D_mean

Gy

2.0 ± 0.7

1.9 ± 0.7^a

2.0 ± 0.7

1.9 ± 0.7^b

Heart

D_max

Gy

18.1 ± 10.5

17.8 ± 10.6

18.2 ± 10.4

18.0 ± 10.5

D_mean

Gy

1.4 ± 1.2

1.4 ± 1.2

1.4 ± 1.2

1.4 ± 1.2

Ipsilateral lung

V₅

%

24.5 ± 7.9

25.1 ± 8.0^a

24.4 ± 7.8

25.0 ± 8.0^b

V₁₀

%

17.0 ± 7.6

17.1 ± 7.7

17.1 ± 7.6

17.1 ± 7.6

V₂₀

%

7.7 ± 4.7

7.6 ± 4.2

7.7 ± 4.2

7.6 ± 4.2

D_mean

Gy

5.0 ± 1.9

5.0 ± 2.0

5.0 ± 2.0

5.0 ± 2.0

Contralateral lung

V₅

%

0.6 ± 0.9

0.6 ± 0.9

0.7 ± 0.9

0.6 ± 0.9^b

D_mean

Gy

0.9 ± 0.4

0.9 ± 0.3

0.9 ± 0.4

0.9 ± 0.3