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Comparative Study
Comparative analysis of the effects of belly board and bladder distension in postoperative radiotherapy of rectal cancer patients.
- Tae Hyun Kim, Dae Yong Kim, Kwan Ho Cho, KimYoung HoonYH, Kyung Hae Jung, Joong-Bae Ahn, Hee Jin Chang, Joo-Young Kim, Hyo Seong Choi, Seok-Byung Lim, Dae Kyung Sohn, and Seung-Yong Jeong.
- Research Institute and Hospital, National Cancer Center, Goyang, Gyeonggi, Korea.
- Strahlenther Onkol. 2005 Sep 1; 181 (9): 601-5.
PurposeTo compare the effect of reducing the irradiated small-bowel volume with the use of belly board, bladder distension or both methods combined, in patients with rectal cancer undergoing postoperative pelvic radiotherapy.Patients And MethodsThis study enrolled 20 consecutive patients with rectal cancer who were scheduled to receive postoperative pelvic radiotherapy. All patients underwent four sets of CT scans under four different methods as follows: group I: empty bladder without the use of a belly board; group II: empty bladder with the use of a belly board; group III: bladder distension without the use of a belly board; group IV: bladder distension with the use of a belly board. The conventional three-field treatment plan was made using a three-dimensional treatment planning system. The irradiated small-bowel volume was calculated at 10% intervals from 10% to 100% of the prescribed dose.ResultsThe volume of the irradiated small bowel decreased in the order of group I, group II, group III, and group IV at all dose levels (p < 0.001). In comparison to group I, the mean absolute volume reductions (relative volume reduction) of the irradiated small bowel were 41.5 +/- 20.1 cm(3) (33.9 +/- 12.9%) in group II, 76.6 +/- 30.5 cm(3) (55.1 +/- 17.8%) in group III, and 98.5 +/- 36.7 cm(3) (70.7 +/- 14.5%) in group IV.ConclusionBladder distension was a more effective method than the belly board for reducing the irradiated small-bowel volume in postoperative pelvic radiotherapy of rectal cancer patients. The combination of the belly board and bladder distension showed an additive effect and was the most effective method for reducing the irradiated small-bowel volume.
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