摘要
目的了解核医学科工作场所中不同化学形态的^(131)I活度浓度,评估职业人员的内照射剂量。方法使用大流量空气采样器进行^(131)I空气采样,利用串联的玻璃纤维滤膜、活性炭滤膜和碘盒分别采集不同化学形态的^(131)I,包括气溶胶碘、气态无机碘和气态有机碘。建立碘盒中非均匀分布^(131)I的活度分析方法,利用高纯锗(HPGe)γ谱仪对15家医院的核医学科工作场所采集的样品进行活度测量。结果15家医院空气样品中气溶胶^(131)I活度浓度为0.19~206.67 Bq/m^(3)(算术平均值22.04 Bq/m^(3)),无机碘的活度浓度范围为0.27~138.45 Bq/m^(3)(算术平均值为12.79 Bq/m^(3)),有机碘的活度浓度范围为2.35~3821.11 Bq/m^(3)(算术平均值为365.08 Bq/m^(3))。上述3种形态^(131)I所致职业人员最大年待积有效剂量分别为0.19、0.19和3.81 mSv,年总待积有效剂量为4.13 mSv。结论气态有机碘是核医学科空气中^(131)I的主要存在形态,应重点考虑对气态有机碘的监测与防护。
Objective To understand the activity concentrations of varying chemical forms of^(131)I in nuclear medicine workplaces and assess the internal irradiation doses of^(131)I to workers.Methods A high-volume air sampler was used for air sampling of^(131)I.Glass fiber filters,activated carbon filters,and iodine cartridges,which were connected in series,were employed to collect aerosol iodine,gaseous inorganic iodine,and gaseous organic iodine,respectively.A method for analyzing the activity of^(131)I unevenly distributed in the iodine cartridge was developed,and an HPGeγspectrometer was used to determine the activity of^(131)I in samples collected from the nuclear medicine workplaces of 15 hospitals.Results The concentrations of aerosol iodine,inorganic iodine,and organic iodine in 15 hospitals were determined at 0.19-206.67,0.27-138.45,and 2.35-3821.11 Bq/m^(3),respectively,with arithmetic means of 22.04,12.79 and 365.08 Bq/m^(3),respectively.The maximum annual committed effective doses of varied forms of^(131)I inhaled by workers were determined at 0.19,0.19,and 3.81 mSv,respectively,with a maximum total committed effective dose of 4.13 mSv.Conclusions Gaseous organic iodine is identified as the primary form of^(131)I in the air within nuclear medicine workplaces.Therefore,it is necessary to highlight the monitoring and protection of gaseous organic iodine.
作者
王硕
拓飞
张建峰
李小亮
杨宝路
周强
Wang Shuo;Tuo Fei;Zhang Jianfeng;Li Xiaoliang;Yang Baolu;Zhou Qiang(Key Laboratory of Radiological Protection and Nuclear Emergency,China CDC,National Institute for Radiological Protection,Chinese Centre for Disease Control and Prevention,Beijing 100088,China)
出处
《中华放射医学与防护杂志》
北大核心
2025年第5期465-471,共7页
Chinese Journal of Radiological Medicine and Protection
关键词
核医学
^(131)I
空气采样
非均匀分布
内照射
Nuclear medicine
^(131)I
Air sampling
Inhomogeneous distribution
Internal radiation
作者简介
通信作者:拓飞,Email:flytuo@163.com。
