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Morphologic change of rectosigmoid colon using belly board and distended bladder protocol

Authors
 Yeona Cho  ;  Jee Suk Chang  ;  Mi Sun Kim  ;  Jaehwan Lee  ;  Hwakyung Byun  ;  Nalee Kim  ;  Sang Joon Park  ;  Ki Chnag Keum  ;  Woong Sub Koom 
Citation
 Radiation Oncology Journal, Vol.33(2) : 134-141, 2015 
Journal Title
 Radiation Oncology Journal 
ISSN
 2234-1900 
Issue Date
2015
Abstract
PURPOSE: This study investigates morphologic change of the rectosigmoid colon using a belly board in prone position and distended bladder in patients with rectal cancer. We evaluate the possibility of excluding the proximal margin of anastomosis from the radiation field by straightening the rectosigmoid colon. MATERIALS AND METHODS: Nineteen patients who received preoperative radiotherapy between 2006 and 2009 underwent simulation in a prone position (group A). These patients were compared to 19 patients treated using a belly board in prone position and a distended bladder protocol (group B). Rectosigmoid colon in the pelvic cavity was delineated on planning computed tomography (CT) images. A total dose of 45 Gy was planned for the whole pelvic field with superior margin of the sacral promontory. The volume and redundancy of rectosigmoid colon was assessed. RESULTS: Patients in group B had straighter rectosigmoid colons than those in group A (no redundancy; group A vs. group B, 10% vs. 42%; p = 0.03). The volume of rectosigmoid colon in the radiation field was significantly larger in group A (56.7 vs. 49.1 mL; p = 0.009). In dose volume histogram analysis, the mean irradiated volume was lower in patients in group B (V45 27.2 vs. 18.2 mL; p = 0.004). In Pearson correlation coefficient analysis, the in-field volume of rectosigmoid colon was significantly correlated with the bladder volume (R = 0.86, p = 0.003). CONCLUSION: Use of a belly board and distended bladder protocol could contribute to exclusion of the proximal margin of anastomosis from the radiation field.
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/141414
DOI
10.3857/roj.2015.33.2.134
Appears in Collections:
1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Radiation Oncology (방사선종양학교실)
Yonsei Authors
금기창(Keum, Ki Chang)
금웅섭(Koom, Woong Sub)
김미선(Kim, Mi Sun)
장지석(Chang, Jee Suk Paul)
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