Analysis of monitoring data of 131I internal exposure among nuclear medicine 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, Guangzhou 510300, China.
- Publication Type:OriginalArticles
- 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 3 years, study the thyroid 131I contamination levels among nuclear medicine staff, and provide a basis for optimizing the monitoring plan. Methods Using a convenience sampling method, 574 detections of nuclear medicine staff from 28 hospitals in Guangdong Province were included in the study. The thyroid 131I activity was measured directly in vivo. Differences in detection rates were analyzed, and committed effective doses were estimated. Results Over the past 3 years in Guangdong Province, 131I accumulation was found in the thyroids of staff from 14 hospitals for 62 (10.8%) detections, with an average activity of 154.8 (13.2-8730.6) Bq. The adjusted annual intake was 50.7 (4.5-820.6) kBq. The committed effective dose was 0.56 (0.05-9.03) mSv/a, and the values were ≥ 2 mSv for 8 persons. Among different positions, nurses showed the highest detection 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 for entering thyroid cancer patient ward (495.4 Bq), with significant differences (P<0.05). Conclusion Monitoring of 131I internal exposure in Guangdong Province found that the radiation doses of some staff members had exceeded the threshold specified in other investigations. Routine personal 131I internal exposure monitoring should be conducted, with increased monitoring frequency. Priority should be given to nurses and cleaners, with monitoring extended to cleaners and outsourced dispensing staff.
