CANCER RISK IN X-RAY TECHNOLOGISTS

明尼苏达大学与国家癌症研究所签订了合同， 美国健康评估协会认证的工人健康状况 自1982年2月起注册放射技师（ARRT）。 一份16页的 光学扫描问卷发送给参与者，以获取信息 癌症史、风险因素、工作史和个人医疗X光检查 暴露。 在接受调查的145，000名技术人员中，有超过90，000人做出了回应 完整的调查问卷。 新增14,000名技术人员 提供了他们的癌症史、心肌梗死史和 甲状腺疾病在简短的电话采访。 报道 白血病和乳腺癌、甲状腺癌和肺癌的有效性， 获得医院、病理学和其他报告。 计算机连接， 美国最大的商业剂量测定公司的记录显示， 至少提供了超过85，000名技术人员的部分暴露历史。 此外，还从雇主那里获得了具体的接触信息， 患有白血病或乳腺癌、甲状腺癌或肺癌的人 以及整个队列的随机样本。 正在进行第二次调查，以获得以下方面的详细资料： 自第一份调查表以来的几年中癌症发病率。 职业和个人暴露于诊断X射线已经编码 可以粗略估计全身辐射剂量。 第二 随访将使我们能够将后续癌症的发生与 这些先前的辐射暴露测量。 癌症的发病率 乳腺癌和甲状腺癌尤其令人感兴趣，因为死亡率数据 不完整

The University of Minnesota has been under contract to the National Cancer Institute in evaluating the health of workers certified by the American Registry of Radiologic Technologists (ARRT) since February 1982. A 16-page optical scan questionnaire was sent to participants to obtain information on cancer history, risk factors, work history, and personal medical x-ray exposures. Over 90,000 of the 145,000 technologists under study responded to the full-length questionnaire. An additional 14,000 technologists provided information on their history of cancer, myocardial infarction, and thyroid conditions during an abbreviated telephone interview. Reported leukemias and cancers of the breast, thyroid, and lung were validated by obtaining hospital, pathology, and other reports. Computer linkage with the records of the nation's largest commercial dosimetry company has provided at least partial exposure histories on over 85,000 technologists. Additionally, specific exposure information was obtained from employers for persons who developed leukemia, or cancer of the breast, thyroid, or lung as well as for a random sample of the entire cohort. This second survey is being undertaken to obtain detailed information on cancer incidence during the years since the first questionnaire. Occupational and personal exposures to diagnostic x-rays are already coded and crude estimates of whole-body radiation doses can be made. A second follow-up will enable us to link the occurrence of subsequent cancer with these previous measures of radiation exposure. Incident cancers of the breast and thyroid are of particular interest because mortality data are incomplete.