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Measurement uncertainty analysis of radiophotoluminescent glass dosimeter reader system based on GD-352M for estimation of protection quantity
Nuclear Engineering and Technology ( IF 2.6 ) Pub Date : 2021-08-13 , DOI: 10.1016/j.net.2021.08.016
Jae Seok Kim 1, 2 , Byeong Ryong Park 1 , Jaeryong Yoo 1 , Wi-Ho Ha 1 , Seongjae Jang 1 , Won Il Jang 1 , Gyu Seok Cho 3 , Hyun Kim 4 , Insu Chang 5 , Yong Kyun Kim 2
Affiliation  

At the Korea Institute of Radiological and Medical Sciences, physical human phantoms were developed to evaluate various radiation protection quantities, based on the mesh-type reference computational phantoms of the International Commission on Radiological Protection. The physical human phantoms were fabricated such that a radiophotoluminescent glass dosimeter (RPLGD) with a Tin filter, namely GD-352M, could be inserted into them. A Tin filter is used to eliminate the overestimated signals in low-energy photons below 100 keV. The measurement uncertainty of the RPLGD reader system based on GD-352M should be analyzed for obtaining reliable protection quantities before using it for practical applications. Generally, the measurement uncertainty of RPLGD systems without Tin filters is analyzed for quality assurance of radiotherapy units using a high-energy photon beam. However, in this study, the measurement uncertainty of GD-352M was analyzed for evaluating the protection quantities. The measurement uncertainty factors in the RPLGD include the reference irradiation, regression curve, reproducibility, uniformity, energy dependence, and angular dependence, as described by the International Organization for Standardization (ISO). These factors were calculated using the Guide to the Expression of Uncertainty in Measurement method, applying ISO/ASTM standards 51261(2013), 51707(2015), and SS-ISO 22127(2019). The measurement uncertainties of the RPLGD reader system with a coverage factor of k = 2 were calculated to be 9.26% from 0.005 to 1 Gy and 8.16% from 1 to 10 Gy. A blind test was conducted to validate the RPLGD reader system, which demonstrated that the readout doses included blind doses of 0.1, 1, 2, and 5 Gy. Overall, the En values were considered satisfactory.



中文翻译:

基于GD-352M的辐射光致发光玻璃剂量计读取器系统的测量不确定度分析用于估计保护量

在韩国放射医学科学研究所,基于国际放射防护委员会的网格型参考计算模型,开发了物理人体模型来评估各种辐射防护量。制造物理人体模型,以便可以将带有锡滤光片的辐射光致发光玻璃剂量计(RPLGD),即GD-352M插入其中。锡滤波器用于消除低于 100 keV 的低能光子中的高估信号。基于 GD-352M 的 RPLGD 阅读器系统的测量不确定度应进行分析,以获得可靠的保护量,然后再将其用于实际应用。一般来说,分析了没有锡过滤器的 RPLGD 系统的测量不确定性,以确保使用高能光子束的放射治疗装置的质量。然而,在本研究中,分析了 GD-352M 的测量不确定度以评估保护量。如国际标准化组织 (ISO) 所述,RPLGD 中的测量不确定性因素包括参考辐照、回归曲线、再现性、均匀性、能量依赖性和角度依赖性。这些因素是使用《测量不确定度表达指南》方法计算的,应用 ISO/ASTM 标准 51261(2013)、51707(2015) 和 SS-ISO 22127(2019)。覆盖因子为 RPLGD 阅读器系统的测量不确定度 分析了GD-352M的测量不确定度以评估保护量。如国际标准化组织 (ISO) 所述,RPLGD 中的测量不确定性因素包括参考辐照、回归曲线、再现性、均匀性、能量依赖性和角度依赖性。这些因素是使用《测量不确定度表达指南》方法计算的,应用 ISO/ASTM 标准 51261(2013)、51707(2015) 和 SS-ISO 22127(2019)。覆盖因子为 RPLGD 阅读器系统的测量不确定度 分析了GD-352M的测量不确定度以评估保护量。如国际标准化组织 (ISO) 所述,RPLGD 中的测量不确定性因素包括参考辐照、回归曲线、再现性、均匀性、能量依赖性和角度依赖性。这些因素是使用《测量不确定度表达指南》方法计算的,应用 ISO/ASTM 标准 51261(2013)、51707(2015) 和 SS-ISO 22127(2019)。覆盖因子为 RPLGD 阅读器系统的测量不确定度 如国际标准化组织 (ISO) 所述。这些因素是使用《测量不确定度表达指南》方法计算的,应用 ISO/ASTM 标准 51261(2013)、51707(2015) 和 SS-ISO 22127(2019)。覆盖因子为 RPLGD 阅读器系统的测量不确定度 如国际标准化组织 (ISO) 所述。这些因素是使用《测量不确定度表达指南》方法计算的,应用 ISO/ASTM 标准 51261(2013)、51707(2015) 和 SS-ISO 22127(2019)。覆盖因子为 RPLGD 阅读器系统的测量不确定度k  = 2 计算为 0.005 到 1 Gy 的 9.26% 和 1 到 10 Gy 的 8.16%。进行了盲测以验证 RPLGD 阅读器系统,该系统表明读出的剂量包括 0.1、1、2 和 5 Gy 的盲剂量。总的来说,E n值被认为是令人满意的。

更新日期:2021-08-13
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