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논문 기본 정보

자료유형
학술저널
저자정보
Cho, Yeona (Department of Radiation Oncology, Yonsei Cancer Center, Yonsei University Health System) Chang, Jee Suk (Department of Radiation Oncology, Yonsei Cancer Center, Yonsei University Health System) Kim, Mi Sun (Department of Radiation Oncology, Yonsei Cancer Center, Yonsei University Health System) Lee, Jaehwan (Icheon Public Health Center) Byun, Hwakyung (Department of Radiation Oncology, Yonsei Cancer Center, Yonsei University Health System) Kim, Nalee (Department of Radiation Oncology, Yonsei Cancer Center, Yonsei University Health System) Park, Sang Joon (Department of Radiation Oncology, Yonsei Cancer Center, Yonsei University Health System) Keum, Ki Chnag (Department of Radiation Oncology, Yonsei Cancer Center, Yonsei University Health System) Koom, Woong Sub (Department of Radiation Oncology, Yonsei Cancer Center, Yonsei University Health System)
저널정보
대한방사선종양학회 Radiation oncology journal : ROJ Radiation oncology journal : ROJ 제33권 제2호
발행연도
2015.1
수록면
134 - 141 (8page)

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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.

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