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Table 4 Dose volume distribution in small bowel and total bowel in prone and supine position

From: A randomized study of the effect of patient positioning on setup reproducibility and dose distribution to organs at risk in radiotherapy of rectal cancer patients

 

Small bowel

Total bowel

 

Prone

Supine

Prone

Supine

 

Prone

Supine

Prone

Supine

 

Dose- level

Mean volume ± SD (cm3)

Mean volume ± SD (cm3)

Proportion irradiated (%)

Proportion irradiated (%)

p-value*

Mean volume ± SD (cm3)

Mean volume ± SD (cm3)

Proportion irradiated (%)

Proportion irradiated (%)

p-value*

V5

250 ± 190

305 ± 238

20

23

0.25

486 ± 278

533 ± 326

18

18

0.49

V10

231 ± 189

272 ± 231

19

20

0.39

433 ± 261

460 ± 299

16

16

0.67

V15

159 ± 162

172 ± 198

13

13

0.75

346 ± 254

304 ± 293

13

10

0.49

V20

117 ± 148

124 ± 174

10

9

0.84

277 ± 242

223 ± 269

10

8

0.45

V25

96 ± 135

109 ± 156

8

8

0.70

243 ± 229

192 ± 227

9

6

0.31

V30

81 ± 119

94 ± 131

7

7

0.64

214 ± 206

165 ± 185

8

6

0.26

V35

71 ± 109

84 ± 117

6

6

0.60

192 ± 187

147 ± 163

7

5

0.25

V40

64 ± 102

76 ± 108

6

6

0.60

180 ± 178

135 ± 149

7

5

0.22

V45

50 ± 89

52 ± 74

4

4

0.90

141 ± 149

98 ± 105

6

3

0.14

  1. *Comparisons of mean volumes to small bowel and total bowel between prone and supine position
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Radiation Oncology

ISSN: 1748-717X

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