高剂量率^(60)Co腔内后装治疗宫颈癌的参考体积和参考点剂量

The Reference Dose and Volume of High Dose Rate^(60)Co Intracavitary Therapy of Uterine Cervical Cancer

本文根据国际放射单位和侧量委员会(ICRU)1985年38号报告建议,在宫颈癌腔内后装治疗中采用总空气比释动能的概念、参考体积的概念、危险器官(直肠、膀胱)和骨结构参考点剂量来说明我院用高剂量率^(60)CO腔内后装治疗宫烦癌的技术。用以上方法便于对不同腔内治疗方法进行比较,在腔内和体外照射中用髂外淋巴结和盆壁参考点来说明盆壁剂量比用“B”点更为明确。髂外淋巴结的位置应根据中国妇女的情况确定。

The recommendations of ICRU Act 5 in 1985 for reporting intracavitary therapy have been considered particularly with regard to the high dose rate afterloading technic in the treatment of carcinoma of the cervix uteri. In the four sets of applications, the reference air kerma rate calculated were 22.97, 25.68, 18.58 and 21.28mGym^2/h re- spectively and its total reference air kerma were 35.14, 39.29,32.89 and 37.67mGym^2. The volume contained within a specified isodose plane and the absorbed dose at reference points are calculated and tabulated. This method is considered a better dose description than that of the conventional reference point'A'and'B'.