Table 2 Comparison of PTV, heart, lung and NTBTV dosimetric data for 3D-CRT, tomotherapy (TOMO), CyberKnife (CK) and CyberKnife with reduced margins (CKRM). CK_RM data are written in bold letters when there are significant differences between CK_RM and at least one other technique (only p-values < 0.05 are specified)

HI

0.132 ± 0.079

0.097 ± 0.016

0.123 ± 0.01

0.121 ± 0.01

DSC

0.805 ± 0.047

0.769 ± 0.053

0.850 ± 0.04

0.858 ± 0.03

D_98% (Gy)D_2% (Gy)

37.5 ± 3.1

39.8 ± 0.5

38.9 ± 0.9

39.0 ± 0.3

43.1 ± 0.5

43.8 ± 0.4

44.1 ± 1.1

44.1 ± 0.3

D_mean (Gy)

11.3 ± 3.7

17.3 ± 4.0

12.3 ± 3.0

9.9 ± 2.0

0.002

0.002

D_2% (Gy)

40.5 ± 1.2

40.3 ± 1.2

39.4 ± 1.5

34.6 ± 2.6

0.0020

0.002

0.002

V_18Gy (%)

28.6 ± 10.2

45.5 ± 12.5

26.4 ± 8.2

20.7 ± 7.1

0.002

0.0039

V_20Gy (%)

27.7 ± 10.1

41.3 ± 12.1

23.3 ± 7.8

17.6 ± 6.5

0.0195

0.0059

0.0039

V_5Gy (%)

6.2 ± 2.3

6.6 ± 3.1

9.8 ± 9.5

3.8 ± 6.1

0.002

V_10Gy (%)

1.2 ± 0.5

2.3 ± 1.6

2.0 ± 2.9

0.7 ± 1.5

0.0059

0.002

V_20Gy (%)

0.2 ± 0.2

0.3 ± 0.5

0.2 ± 0.4

0.0

0.0078

0.0156

0.0312

V_2Gy (%)

4.7 ± 3.4

2.2 ± 3.1

7.5 ± 6.7

3.9 ± 7.6

V_5Gy (%)

0.2 ± 0.4

0.0 ± 0.0

0.3 ± 0.7

0.0 ± 0.0

D_2% (Gy)

0.3 ± 0.2

1.7 ± 1.0

1.3 ± 2.0

1.3 ± 1.8