| HE Yu-xiang,CAI Yong,ZOU Yue,ZHU Xiang-gao.Analysis of influence factors on the volume of pelvic bowel irradiated for rectal cancer[J].Chinese Journal of Radiological Medicine and Protection,2007,27(5):482-485 |
| Analysis of influence factors on the volume of pelvic bowel irradiated for rectal cancer |
| Received:September 29, 2006 |
| DOI： |
| KeyWords:Rectal cancer Bowel Bladder Radiotherapy |
| FundProject: |
| Author Name | Affiliation | E-mail | | HE Yu-xiang | Department of Radiation Oncology, Peking University the School Oncology, Beijing 100036, China | | | CAI Yong | Department of Radiation Oncology, Peking University the School Oncology, Beijing 100036, China | caiyong109@sohu.com | | ZOU Yue | 第二炮兵总医院 | | | ZHU Xiang-gao | Department of Radiation Oncology, Peking University the School Oncology, Beijing 100036, China | | | 郭梅 | The Affiliated Hospital, Academy of Military Medical Sciences, Beijing100071, China | | | 韩树奎 | Department of Radiation Oncology, Peking University the School Oncology, Beijing 100036, China | | | 徐博 | Department of Radiation Oncology, Peking University the School Oncology, Beijing 100036, China | | | 王丹红 | The Affiliated Hospital, Academy of Military Medical Sciences, Beijing100071, China | | | 赵红霞 | 第二炮兵总医院 | |
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| Abstract:: |
| Objective To evaluate influence of prone supine position, gender, operation, bladder distension on bowel irradiated for patients with rectal cancer during pelvic radiotherapy. Methods 36 patients with rectal cancer were investigated. Treatment plans were created with three dimensional treatment planning system. The dose and volume of bowel irradiated were analyzed according to dose-volume histograms (DVH) for every patient. The prescribed dose was 50 Gy. Results The extent of bladder distension significantly influenced the mean doses and the V45 high dose volumes of bowel irradiated. The treatment position and gender significantly influenced the V15 low dose volume of bowel irradiated, the operation significantly influenced the mean doses of bowel. Either prone and supine position, or preoperative and postoperative, the doses of bowel irradiated for good bladder distension were lower and the volumes were smaller than that for bad bladder distension. The V45 high dose volume of bowel irradiated for bad and good bladder distension at prone position were 15.3% and 7.4%(P=0.023),respectively, and at postoperative 14.1% and 7.2%(P=0.014), respectively. Conclusions The doses and volumes of pelvic bowel irradiated were significantly influenced by the extent of bladder distension, and partly influenced by the prone/supine position, gender and operation. |
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