Analysis of monitoring data of 131I internal exposure among nuclearmedicine staff in Guangdong Province, China, 2022-2024
10.13491/j.issn.1004-714X.2026.03.001
- VernacularTitle:广东省2022—2024年核医学工作人员131I内照射监测结果分析
- Author:
Hongwei YU
1
;
Xuan LONG
1
;
Zhan TAN
1
;
Huifeng CHEN
1
;
Rui MA
1
;
Weixu HUANG
1
Author Information
1. Guangdong Province Hospital for Occupational Disease Prevention and Treatment
- Publication Type:Journal Article
- Keywords:
Nuclear medicine;
Radiation worker;
131I;
Internal radiation;
Thyroid
- From:
Chinese Journal of Radiological Health
2026;35(3):313-318
- CountryChina
- Language:Chinese
-
Abstract:
Objective :To analyze the monitoring data of 131I internal exposure in Guangdong Province over the past 3years, study the thyroid 131I contamination levels among nuclear medicine staff, and provide a basis for optimizing themonit-oring plan.
Methods :Using a convenience sampling method, 574 detections of nuclear medicine staff from 28 hospitals inGuangdong Province were included in the study. The thyroid 131I activity was measured directly in vivo. Differences indetec-tion rates were analyzed, and committed effective doses were estimated.
Results :Over the past 3 years in GuangdongProvince, 131I accumulation was found in the thyroids of staff from 14 hospitals for 62 (10.8%) detections, with an averageactivity of 154.8 (13.2-8730.6) Bq. The adjusted annual intake was 50.7 (4.5-820.6) kBq. The committed effective dose was0.56 (0.05-9.03) mSv/a, and the values were ≥ 2 mSv for 8 persons. Among different positions, nurses showed the highestdetection rate (19.6%), followed by cleaners (14.7%), with significant differences (P<0.05). Among different exposure types,the detection rate was highest for loading medication into automatic dispenser (23.3%), and the mean activity was highest forentering thyroid cancer patient ward (495.4 Bq), with significant differences (P<0.05).
Conclusion : Monitoring of 131Iin-ternal exposure in Guangdong Province found that the radiation doses of some staff members had exceeded the thresholdspecified in other investigations. Routine personal 131I internal exposure monitoring should be conducted, with increasedmonitoring frequency. Priority should be given to nurses and cleaners, with monitoring extended to cleaners and outsourceddispensing staff.
