【摘要】 目的 通过对直肠剂量受量的监测，探索宫颈癌腔内治疗直肠剂量受量及用剂量学推导宫颈口到直肠的平均距离。方法 抽样临床病例25例，在Selectron-HDR后装机治疗时，插入SDS-6型5个半导体探头进行监测。结果 f=67%，子宫颈口到直肠的平均距离为3.2cm。结论 怎样采取措施进一步降低直肠受量及高剂量率腔内治疗的剂量学及生物效应，都需继续研究。

    【关键词】 腔内治疗；直肠剂量受量；半导体剂量仪；子宫颈癌

    Monitoring of rectum dose accepting amount when cervix cancer were treated with radiation via inner place the cavity

    HAN Le-yun,DOU Shao-yu，CHEN Le.

    Sichuan Cancer Hospital, Chengdu 610041, China

    【Abstract】 Objective By means of the monitoring rectum dose accepting amount, probing to rectum dose accepting amount when radiotherapy for the cervix cancer in therapy of inner place of the cavity and the average distance between dosimetry cervical rim and the rectum、stuff and means.Methods Sampling 25 instances of clinical cases, when treated with the selectron-HDR remote afterloading system, stick in 5 semiconductor probes mounted on the SDS-6's monitor.Results f： average distance between cervix rim and the rectum which is 3.2cm has come to 67%.Conclusion How to take the steps to decrease further accepting amount of rectum, study dosimetry and the biology effect on treating inner place the cavity of high-dose-rate, require to research continually. ......