Conclusions The combination of belly board and d istended bladd er was more effectively to reduce the irradiated small bowel volume among 3 moul ds, so as to minimized acute diarrhea toxicity.

• 结论 膀胱充盈状态下特殊体模固定的俯卧位照射方式明显降低了小肠和膀胱的受照射剂量，减少 了小肠急性放射反应的发生。