Table 5 Dosimetric parameters for organs at risk with each planning technique

C-IMRT

A-IMRT

VMAT

Bone marrow V40 (%)

47.00 ± 6.94^a

(33.21–56.52)

47.79 ± 7.53^a

(33.90–58.12)

35.14 ± 2.33^b

(29.99–40.33)

Bladder V45 (%)

44.21 ± 6.67^a

(30.15–55.47)

32.84 ± 2.03^b

(28.62–34.88)

25.59 ± 4.72^c

(19.58–34.17)

Rectum V30 (%)

73.80 ± 4.75^a

(63.64–80.62)

56.18 ± 2.05^b

(52.16–59.77)

49.37 ± 4.82^c

(38.96–58.06)

Bowel V35 (%)

30.83 ± 9.68^a

(13.41–45.44)

31.27 ± 9.77^a

(14.85–47.57)

27.62 ± 8.17^b

(10.38–39.47)

Bowel V40 (%)

26.10 ± 8.93^a

(9.11–38.14)

25.76 ± 8.56^a,b

(10.11–39.46)

22.06 ± 6.92^b

(6.51–31.24)

Right femoral head V30 (%)

21.42 ± 4.03^a

(15.39–27.62)

12.19 ± 1.34^b

(10.33–14.87)

8.71 ± 2.41^b

(4.71–13.30)

Left femoral head V30 (%)

21.35 ± 4.16^a

(15.20–31.32)

12.58 ± 1.48^b

(9.29–14.85)

8.79 ± 2.39^c

(5.61–14.84)

Normal tissue (cGy)

1981 ± 423^a

(849–2532)

1966 ± 416^a

(855–2509)

1799 ± 355^b

(785–2235)