An investigation of radiation levels in some yttrium-90 resin microsphere therapy institutions in Guangdong Province, China
10.13491/j.issn.1004-714X.2024.05.005
- VernacularTitle:广东省部分钇-90树脂微球治疗场所辐射水平调查
- Author:
Huaiying LIN
1
;
Zhanyong WANG
1
;
Fei DENG
1
;
Yujuan CHEN
1
;
Yini WU
1
Author Information
1. Environmental Radiation Monitoring and Nuclear Emergency Response Technical Support Center of Guangdong Province, Guangzhou 510300 China.
- Publication Type:OriginalArticles
- Keywords:
Yttrium-90 resin microsphere;
Dose equivalent rate;
Radioactive surface contamination;
Radiation level
- From:
Chinese Journal of Radiological Health
2024;33(5):517-522
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the radioprotection and management of yttrium-90 resin microsphere therapy based on the survey and monitoring of treatment institutions in Guangdong Province, China, and to provide technical reference and basis for the subsequent radiation management of this therapy. Methods Based on the technical data on yttrium-90 resin microsphere therapy collected from both domestic and international sources, an investigation was conducted on some yttrium-90 resin microsphere treatment institutions in Guangdong Province. Radiation level monitoring was carried out in the radioactive workplaces of three hospitals that had conducted yttrium-90 resin microspheres therapy. Environmental X-γ dose rate meters were used for detecting radiation dose equivalent rates, while α and β surface contamination monitors were used for detecting radioactive surface contamination. Additionally, urine samples from two patients were collected within 24 hours post-operation, and total radioactivity was analyzed using low-background α and β counters. Results During the yttrium-90 resin microsphere therapy, the radiation dose equivalent rates around the digital subtraction angiography rooms in the three hospitals ranged from 0.15 to 0.26 μSv/h, and the radiation dose equivalent rates around the observation wards ranged from 0.17 to 0.69 μSv/h. The β radioactive surface contamination values in the workplace control zones ranged from ＜0.07 to 18.7 Bq/cm², while the values in the supervised zones were all less than 0.07 Bq/cm². The total β radioactivity in the urine of the two patients within 24 hours post-operation accounted for approximately 0.0010% to 0.0013% of the yttrium-90 infusion dose. Conclusion The radiation levels at the monitoring sites in the workplaces of the three hospitals are below the national standard limits. The radioprotection and management of yttrium-90 resin microsphere therapy in the three hospitals in Guangdong Province are satisfactory.
