CANCER RISK IN X-RAY TECHNOLOGISTS

确定癌症是否与低剂量职业x射线有关 通过评估人群辐射致癌死亡的风险来评估辐射暴露 16万名注册的美国注册X射线技术员 放射技术专家(ARRT)和接受辐射剂量的估计 由X光技术专家完成。准备一份详细随访的研究方案 用于定位非活动和活动ARRT成员的程序和策略， 辐射暴露类别的估算方法.程序 向所有定位的成员邮寄调查问卷，以及确认的方法 从邮寄问卷中确定的组织学癌症，死亡 证书或医疗记录。为最终分类准备方法 辐射暴露，协助建立剂量测定委员会，编码所有 收集数据，并提供“干净”数据集的计算机磁带副本，以 项目官员。对数据集的分析将由两家公司进行 承包商和项目官员。

Determine whether cancer is associated with low-dose occupational x-ray exposure by evaluation of the risk of radiation-induced cancer mortality in 160,000 registered x-ray technologists of the American Registry of Radiologic Technologists (ARRT), and estimation of radiation dose received by the x-ray technologists. Prepare a study protocol detailing follow-up procedures and strategies for locating inactive and active ARRT members, methods for estimating radiation exposure categories, procedures for mailing questionnaires to all located members, and approaches to confirm histologically cancers identified from the mail questionnaires, death certificates, or medical records. Prepare methodsfor final categorization of radiation exposure, assist in setting up a dosimetry committee, code all collected data, andprovide a computer tape copy of the "clean" data set to the Project Officer. Analyses of the data set will be conducted by both the Contractor and the Project Officer.