CANCER RISK IN X-RAY TECHNOLOGISTS

明尼苏达大学已经与国家癌症协会签订了合同 美国认证的工人健康评估协会 自1982年2月起注册为放射技术师(ARRT)。长达16页的 向参与者发送光学扫描问卷以获取信息 关于癌症病史、风险因素、工作史和个人医疗x光 曝光。在接受调查的14.5万名技术人员中，超过9万人回答 到完整的调查问卷。另外14,000名技术人员 提供了有关他们癌症、心肌梗塞和 在一次简短的电话采访中，他的甲状腺状况。已报告 白血病和乳腺癌、甲状腺癌和肺癌通过以下方式得到验证 获取住院、病理和其他报告。计算机与 美国最大的商业剂量测量公司的记录 提供了超过85,000名技术人员的至少部分接触史。 此外，还从雇主那里获得了具体的接触信息， 罹患白血病或乳腺癌、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，以获得关于 自第一次问卷调查以来历年的癌症发病率。 职业性和个人暴露于诊断x光已被编码 还可以对全身辐射剂量进行粗略估计。一秒钟 后续行动将使我们能够将后续癌症的发生与 这些以前的辐射暴露指标。突发的癌症 乳房和甲状腺特别受关注，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.