CANCER RISK IN X-RAY TECHNOLOGISTS

确定癌症是否与低剂量职业X射线有关 通过评估辐射诱发癌症死亡率的风险， 160，000名美国注册处的注册X射线技术人员 放射技术人员（ARRT）和接受的辐射剂量估计 由X光技术人员完成。 准备一份详细说明随访情况的研究方案 用于定位不活跃和活跃的ARRT成员的程序和策略， 辐射暴露类别的估算方法、程序 向所有成员邮寄调查问卷，并通过各种方式确认 从邮寄问卷中发现的组织学癌症，死亡 证明或医疗记录。 为最终分类准备方法 协助设立剂量测定委员会， 收集的数据，并提供一个计算机磁带副本的“干净”的数据集， 项目官员。 数据集的分析将由两个机构进行， 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.