Table 4 Improvement ratios of the dosimetric indices according to the types of target in IMRT and VMAT

Overall

TVC

0.42 ± 1.01

2.39 ± 5.24

2.74 ± 2.80

17.16 ± 14.68

0.006

CI

−0.41 ± 9.34

−5.58 ± 6.61

3.77 ± 9.00

−7.46 ± 19.63

0.396

GI

8.89 ± 33.04

−10.61 ± 4.40

−7.85 ± 5.31

−15.46 ± 9.52

0.122

IMRT

TVC

−0.16 ± 0.36

3.62 ± 7.97

2.10 ± 2.32

27.99 ± 13.35

0.007

CI

−4.97 ± 8.94

−6.83 ± 4.75

7.16 ± 9.91

−14.81 ± 18.92

0.231

GI

−8.85 ± 4.59

−14.30 ± 2.43

−9.37 ± 5.68

−22.62 ± 7.57

0.047

VMAT

TVC

1.01 ± 1.18

1.15 ± 0.78

3.37 ± 3.61

6.34 ± 3.11

0.094

CI

4.14 ± 8.72

−4.33 ± 9.06

−0.39 ± 8.35

−0.11 ± 21.06

0.883

GI

26.64 ± 41.98

−6.92 ± 1.32

−6.33 ± 5.59

−8.29 ± 3.92

0.208