|
|
Investigation on the radiation of 131I in treatment site of a grade A tertiary hospital |
LI Sijia, HAN Yufu, WANG Hualin, LIU Libo, CHEN Dawei, HE Qiang |
Key Laboratory of Radiobiology of NHC, School of Public Health, Jilin University, Changchun 130021 China |
|
|
Abstract Objective To detect the radiation of 131I in treatment site of a grade A tertiary hospital. Methods A total of 25 patients with thyroid cancer were administrated 131I at a total dose of 82880 MBq. After administration, the ambient dose equivalent rate of the ward was detected with X- and γ-ray detectors. After patient discharge, surface contamination of the ward was detected with α/β surface contamination meter. During patient hospitalization and on the day of discharge, air samples were collected from 131I treatment site and office area. The air samples were measured using a HPGe γ-ray spectrometer and the concentration of 131I in air was calculated. Results The ambient dose equivalent rate in the ward ranged from 0.15 to 0.46 μSv/h. Before ward cleaning, surface contamination ranged from 0.53 to 40.1 Bq/cm2 and the highest value was recorded on the toilet. Within 4 h after administration, the concentrations of 131I in air in treatment site and the corridor of the office area were 1.74 Bq/m3 and 0.66 Bq/m3, respectively. The ventilation air flow rate in the treatment site was 0.50 m/s. Ventilation decreased the concentration of 131I in air by 29.7%, 79.7%, and 53.3% compared with the previous day during hospitalization and on the day of discharge. Conclusion The radiation of external exposure of 131I in the treatment site is low and the shielding is effective. Before ward cleaning, the surface contamination is lower than the required limits except for the toilet. Ventilation is the primary way to reduce the concentration of 131I in air.
|
Received: 11 October 2020
|
|
|
|
|
[1] Chinese Society of Clinical Oncology (CSCO) Diagnosis and Treatment Guidelines for Persistent/Recurrent and Metastatic Differentiated Thyroid Cancer Working Group. Chinese Society of Clinical Oncology (CSCO) diagnosis and treatment guidelines for persistent/recurrent and metastatic differe-ntiated thyroid cancer 2018 (English version)[J]. Chin J Cancer Res, 2019, 31(1): 99-116. DOI: 10.21174/j.issn.1000-9604.2019.01.06 [2] 中华医学会核医学分会. 2020年全国核医学现状普查结果简报[J]. 中华核医学与分子影像杂志,2020,40(12):747-749. DOI: 10.3760/cma.j.cn321828-20201109-00403 Chinese Society of Nuclear Medicine. A brief report on the results of the national survey of nuclear medicine in 2020[J]. Chin J Nucl Med Mol Imaging, 2020, 40(12): 747-749. DOI: 10.3760/cma.j.cn321828-20201109-00403 [3] 中华医学会核医学分会. 2018年全国核医学现状普查结果简报[J]. 中华核医学与分子影像杂志, 2018, 38(12): 813-814. DOI: 10.3760/cma.j.issn.2095-2848.2018.12.010. Chinese Society of Nuclear Medicine. A brief report on the results of the national survey of nuclear medicine in 2018[J]. Chin J Nucl Med Mol Imaging, 2018, 38(12): 813-814. DOI: 10.3760/cma.j.issn.2095-2848.2018.12.010. [4] 彭玄, 拓飞. 人体甲状腺中131I的测量方法进展[J]. 中国辐射卫生,2020,29(3):313-317. DOI: 10.13491/j.issn.1004-714X.2020.03.029 Peng X, Tuo F. Progress in measurement of 131I in human thyroid[J]. Chin J Radiol Health, 2020, 29(3): 313-317. DOI: 10.13491/j.issn.1004-714X.2020.03.029 [5] 刘明, 耿建华, 梁颖. 核医学治疗分化型甲状腺癌场所空气中131I浓度的研究进展[J]. 中国辐射卫生,2019,28(6):734-736. DOI: 10.13491/j.issn.1004-714X.2019.06.036 Liu M, Geng JH, Liang Y. Research progress of 131I concentration in the air in the 131I th-yroid carcinoma treatment site[J]. Chin J Radiol Health, 2019, 28(6): 734-736. DOI: 10.13491/j.issn.1004-714X.2019.06.036 [6] International Commission on Radiological Protection. ICRP Publication 94. Release of p-atients after therapy with unsealed radionuclides[J]. Ann ICRP, 2004, 34(2): v-vi. DOI: 10.1016/j.icrp.2004.08.001. [7] Karo C, Ideguchi R, Nishi K, et al. Radiation monitoring of an isolation room for 131I therapy after the patients were released[J]. Health Phys, 2019, 117(4): 419-425. DOI: 10.1097/HP.0000000000001063 [8] Brudecki K, Kluczewska-Galka A, Mróz T, et al. 131I internal contamination and committed dose assessment among nuclear medicine medical personnel[J]. Radiat Prot Dosimetry, 2018, 179(3): 275-281. DOI: 10.1093/rpd/ncx274 [9] Alnaaimi M, Alkhorayef M, Omar M, et al. Occupational radiation exposure in nucl-ear medicine department in Kuwait[J]. Radiat Phys Chem, 2017, 140: 233-236. DOI: 10.1016/j.radphyschem.2017.02.048 [10] 国家卫生健康委员会. GBZ 120—2020 核医学放射防护要求[S]. 北京: 中国标准出版社, 2020. National Health Commission. GBZ 120—2020 Requi-rements for radiological protection in nuclear medicine[S]. Beijing: China Standard Press, 2020. [11] 国家质量监督检验检疫总局. GB/T 11713—2015 高纯锗γ能谱分析通用方法[S]. 北京: 中国标准出版社, 2016. General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China. GB/T 11713—2015 General analytical methods of high-purity ger-manium gamma spectrometer[S]. Beijing: China Standard Press, 2016. [12] 国家卫生和计划生育委员会. WS/T 184—2017 空气中放射性核素的γ能谱分析方法[S]. 北京: 中国标准出版社, 2017. National Health and Family Planning Commission. WS/T 184—2017 Determination of radionuclides in air by gamma spectrometry[S]. Beijing: China Standard Press, 2017. [13] 中华人民共和国国家质量监督检验检疫总局. GB 18871—2002 电离辐射防护与辐射源安全基本标准[S]. 北京: 中国标准出版社, 2004. General Administration of Quality Supervision, Inspection and Quarantine of the People’sRepublic of China. GB 18871—2002 Basic standards for protection against ionizing rad-iation and for the safety of radiation sources[S]. Beijing: China Standard Press, 2004. [14] 李玲玲. 石家庄市某医院核医学科放射性废物处理措施的效果评价[J]. 职业与健康,2017,33(10):1408-1410. DOI: 10.13329/j.cnki.zyyjk.2017.0435 Li LL. Evaluation on effect of radioactive waste treatment measures in nuclear medicine department of a hospital in Shijiazhuang City[J]. Occup Health, 2017, 33(10): 1408-1410. DOI: 10.13329/j.cnki.zyyjk.2017.0435 [15] 王红波. 核医学科工作人员职业性内照射研究[D]. 北京: 中国疾病预防控制中心, 2017. Wang HB. Study on occupational internal exposure of nuclear medicine workers[D]. Beijing: Chinese Center for Disease Control and prevention, 2017. [16] 彭玄, 张建峰, 拓飞, 等. 便携式γ谱仪在放射工作人员甲状腺131I监测中的应用[J]. 中国辐射卫生,2021,30(1):34-37,43. DOI: 10.13491/j.issn.1004-714X.2021.01.008 Peng X, Zhang JF, Tuo F, et al. Application of portable γ-ray spectrometer in monitoring thyr-oid 131I in radiation workers[J]. Chin J Radiol Health, 2021, 30(1): 34-37,43. DOI: 10.13491/j.issn.1004-714X.2021.01.008 [17] 国家卫生和计划生育委员会. GBZ 129—2016 职业性内照射个人监测规范[S]. 北京: 中国标准出版社, 2016. National Health and Family Planning Commission. GBZ 129—2016 Specifications for individual monitoring of occupational internal exposure [S]. Beijing: China Standard Press, 2016. [18] Valentin J. Basic anato-mical and physiological data for use in radiological protection: reference values ICRP publication 89[J]. Ann ICRP, 2002, 32(3/4): 1-277. DOI: 10.1016/S0146-6453(03)00002-2 [19] 国家卫生和计划生育委员会. GBZ/T 200.3—2014 辐射防护用参考人 第3部分主要生理学参数[S]. 北京: 中国标准出版社, 2015. National Health and Family Planning Commission. GBZ/T 200.3—2014 Reference individuals for use in radiation protection—Part 3 : main physiological para-meters [S]. Beijing: China Standard Press, 2015.
|
|
|
|