IMRT ± SD

3DCRT ± SD

P-value

V25 (%)

55.12 ± 10.53

69.22 ± 16.65

0.05

V40 (%)

36 ± 7.38

44.42 ± 12.87

0.05

V60 (%)

18.22 ± 4.44

28.86 ± 9.46

0.012

V70 (%)

8.75 ± 2.42

18.77 ± 9.31

0.025