Table 3 Comparison of dose indices

PTV initial

D98 (%)

95.2 ± 1.6

95.3 ± 1.6

0.748

D93 (%)

99.6 ± 0.2

99.8 ± 0.2

0.019

D2 (%)

104.6 ± 0.5

104.6 ± 0.4

0.943

CI

0.83 ± 0.06

0.78 ± 0.03

0.002

HI

0.72 ± 0.05

0.76 ± 0.04

0.003

PTV boost

D98 (%)

95.7 ± 4.5

98.7 ± 0.9

< 0.001

D93 (%)

97.8 ± 3.5

99.9 ± 0.2

< 0.001

D2 (%)

104.3 ± 0.8

103.5 ± 0.4

< 0.001

CI

0.79 ± 0.08

0.82 ± 0.05

0.222

HI

0.69 ± 0.17

0.80 ± 0.07

< 0.001

OAR for plan sum

Small bowel

Dmax (Gy)

48.6 ± 3.8

49.3 ± 3.6

0.053

V30 (%)

29.8 ± 16.7

21.5 ± 12.1

< 0.001

V40 (%)

16.9 ± 12.8

12.6 ± 8.6

< 0.001

Bladder

Mean dose (Gy)

30.4 ± 3.6

24.4 ± 4.4

< 0.001

Dmax (Gy)

50.3 ± 2.0

50.2 ± 2.4

0.829

V50 (%)

1.6 ± 3.0

2.0 ± 3.0

0.776

Right femoral head

Mean dose (Gy)

18.1 ± 2.5

21.7 ± 3.4

< 0.001

Dmax (Gy)

39.0 ± 3.5

41.5 ± 3.0

< 0.001

Left femoral head

Mean dose (Gy)

17.6 ± 3.5

21.8 ± 3.1

< 0.001

Dmax (Gy)

40.8 ± 3.6

42.5 ± 2.4

0.043