Measurement and analysis of activity concentrations of varying forms of 131I in nuclear medicine workplaces
10.3760/cma.j.cn112271-20241216-00480
- VernacularTitle:核医学科工作场所中不同形态 131I的活度浓度测量与分析
- Author:
Shuo WANG
1
;
Fei TUO
1
;
Jianfeng ZHANG
1
;
Xiaoliang LI
1
;
Baolu YANG
1
;
Qiang ZHOU
1
Author Information
1. 中国疾病预防控制中心辐射防护与核安全医学所 辐射防护与核应急中国疾病预防控制中心重点实验室，北京 100088
- Publication Type:Journal Article
- Keywords:
Nuclear medicine;
131I;
Air sampling;
Inhomogeneous distribution;
Internal radiation
- From:
Chinese Journal of Radiological Medicine and Protection
2025;45(5):465-471
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To understand the activity concentrations of varying chemical forms of 131I in nuclear medicine workplaces and assess the internal irradiation doses of 131I to workers. Methods:A high-volume air sampler was used for air sampling of 131I. 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 131I unevenly distributed in the iodine cartridge was developed, and an HPGe γ spectrometer was used to determine the activity of 131I 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 2.35-3 821.11 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 131I 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 131I in the air within nuclear medicine workplaces. Therefore, it is necessary to highlight the monitoring and protection of gaseous organic iodine.
