Niklason L T, Marx M V, Chan H P
Department of Radiology, Massachusetts General Hospital, Boston 02114.
Radiology. 1993 Jun;187(3):729-33. doi: 10.1148/radiology.187.3.8497622.
Interventional radiologists receive nonuniform occupational radiation doses, with relatively high doses to the head and extremities and low doses to the trunk, which is protected by a lead apron. Twenty-eight interventional radiologists from 17 institutions wore thermoluminescent dosimeters over their collars and under their aprons for a 2-month period. The estimated annual radiation dose was converted to effective dose as suggested by the International Commission on Radiological Protection. Effective dose is used to relate the risk associated with nonuniform dose to that associated with an equivalent uniform whole-body dose. The mean annual effective dose was 3.16 mSv (316 mrem), with a range of 0.37-10.1 mSv. The mean annual effective dose is approximately equal to the mean natural background dose of 3 mSv per year from radon and other natural sources and is only 6% of the National Council on Radiation Protection and Measurements' recommended effective dose equivalent limit of 50 mSv per year. The annual radiation risk of fatal cancer would be less than one per 10,000 for almost the entire career of an interventional radiologist.
介入放射科医生接受的职业辐射剂量并不均匀，头部和四肢所受剂量相对较高，而躯干因有铅围裙保护所受剂量较低。来自17家机构的28名介入放射科医生在衣领处和围裙下佩戴热释光剂量计，为期2个月。按照国际放射防护委员会的建议，将估计的年辐射剂量转换为有效剂量。有效剂量用于将与非均匀剂量相关的风险与等效均匀全身剂量相关的风险联系起来。年平均有效剂量为3.16毫希沃特（316毫雷姆），范围为0.37 - 10.1毫希沃特。年平均有效剂量大约等于每年来自氡和其他天然来源的平均天然本底剂量3毫希沃特，仅为美国国家辐射防护与测量委员会建议的年有效剂量当量限值50毫希沃特的6%。对于介入放射科医生几乎整个职业生涯来说，致命癌症的年辐射风险将小于万分之一。
