墨西哥国家核科学与技术研究所（SSDL-ININ）针对诊断放射学IEC 61267:2005和辐射防护ISO 4037:2019 X射线束质的比释动能系数（Ka CMC）能力验证结果。

Results of the proficiency test for the Ka CMC of the SSDL-ININ Mexico, for diagnostic radiology IEC 61267:2005 and radiation protection ISO 4037:2019 X-ray beam qualities.

作者信息

Romero José Trinidad Álvarez, Salas Gonzalo Walwyn, de Los Angeles Montes Rodríguez María, Vertti Mario Raymundo Cabrera, Acosta Andy Luis Romero

机构信息

Secondary Standard Dosimetry Laboratory, Ionizing Radiation Metrology Department, Instituto Nacional de Investigaciones Nucleares, Carretera Federal México Toluca S/N, La Marquesa, Ocoyoacac, Estado de México 52750, Mexico.

Secondary Standard Dosimetry Laboratory, Centro de Proteccion e Higiene de las Radiaciones, Carretera La Victoria II Km 2½, e/Monumental y Final, Guanabacoa, La Habana 11100, Cuba.

出版信息

Radiat Prot Dosimetry. 2024 Dec 31;201(1):31-40. doi: 10.1093/rpd/ncae208.

DOI:10.1093/rpd/ncae208

PMID:39656635

Abstract

The present work describes the results for the bilateral comparison between the Secondary Standards Dosimetry Laboratories of the Instituto Nacional de Investigaciones Nucleares (SSDL-ININ), Mexico, and the pilot laboratory, the Centro de Protección e Higiene de las Radiaciones (SSDL-CPHR), Cuba, for the realization of the air kerma (${\boldsymbol{K}}{\boldsymbol{a}}$) quantity to: (i) diagnostic X-ray (DXR) IEC 61267:2005 beam qualities: RQR 5 RQR 9, RQT 8, and RQT 9 and (ii) radiation protection (RP) ISO 4037:2019 X-ray beam qualities: N60, N100, and W60, as well S-Cs for gamma radiation. The matched and characterized reference fields are realized at SSDL-ININ with a Toshiba E7252FX X-ray tube. In all cases, the ${\boldsymbol{K}}{\boldsymbol{a}}$ measurements are traceable to PTB, except for S-Cs, traceable to ININ. The SSDL-CPHR realizes its reference radiation beam qualities also as matched reference fields with a Pantak HF160C X-ray tube. For the S-Cs beam quality, the CPHR uses a Buchler OB6 irradiator; the ININ, a Siemens Cesagammatron. The transfer ionization chambers calibrated in the RQR and RQT qualities are an Exradin A650/DO70312; for the RQT qualities for CT, a PTW 30009/0655 and RC3CT/9217 were calibrated; and for the RP X-ray qualities, the Exradin A650/DO70312 and a PTW 32002/073 were calibrated. The ratio ${\boldsymbol{R}}{\boldsymbol{k}}$ of the resulting calibration coefficients ${\boldsymbol{N}}{{\boldsymbol{K}}{\boldsymbol{a}}}$ of each SSDL of the RQR qualities are consistent within the $\boldsymbol{U}\left(\boldsymbol{k}=\mathbf{2}\right)%$ ≤ 2.3%; for the RQT qualities, the differences are less than the $\boldsymbol{U}\left(\boldsymbol{k}=\mathbf{2}\right)%$ ≤ 3.6%; and for the RP X-ray qualities, within the order of $\boldsymbol{U}\left(\boldsymbol{k}=\mathbf{2}\right)%$ ≤ 3.5%. For the S-Cs quality, the ${\boldsymbol{R}}{\boldsymbol{k}}$ is in the order of $\boldsymbol{U}\left(\boldsymbol{k}=\mathbf{2}\right)$ ≤ 3.0%. It should be noted that the ININ U's are generally larger due to the failure of the ${\boldsymbol{k}}{\boldsymbol{TP}}$ correction factor, a brief discussion is given here. The ${\boldsymbol{E}}{\boldsymbol{n}}$ score from ISO 17043 provides statistical support to this comparison.

摘要

本工作描述了墨西哥国家核研究所二级标准剂量实验室（SSDL-ININ）与古巴辐射防护与卫生中心试点实验室（SSDL-CPHR）之间双边比较的结果，该比较旨在实现空气比释动能（${\boldsymbol{K}}{\boldsymbol{a}}$）量，具体针对：（i）诊断X射线（DXR）IEC 61267:2005束质：RQR 5、RQR 9、RQT 8和RQT 9，以及（ii）辐射防护（RP）ISO 4037:2019 X射线束质：N60、N100和W6, 以及用于伽马辐射的S-Cs。在SSDL-ININ使用东芝E7252FX X射线管实现了匹配且特征明确的参考场。在所有情况下，除了S-Cs可溯源至ININ外，${\boldsymbol{K}}{\boldsymbol{a}}$测量均溯源至德国物理技术研究院（PTB）。SSDL-CPHR也使用Pantak HF160C X射线管将其参考辐射束质实现为匹配参考场。对于S-Cs束质，CPHR使用Buchler OB6辐照器；ININ使用西门子Cesagammatron。在RQR和RQT质中校准的传输电离室为Exradin A650/DO70312；对于CT的RQT质，校准了PTW 30009/0655和RC3CT/9217；对于RP X射线质，校准了Exradin A650/DO70312和PTW 32002/073。每个SSDL的RQR质的校准系数${\boldsymbol{N}}{{\boldsymbol{K}}{\boldsymbol{a}}}$的比值${\boldsymbol{R}}{\boldsymbol{k}}$在$\boldsymbol{U}\left(\boldsymbol{k}=\mathbf{2}\right)%$≤2.3%范围内一致；对于RQT质，差异小于$\boldsymbol{U}\left(\boldsymbol{k}=\mathbf{2}\right)%$≤3.6%；对于RP X射线质，在$\boldsymbol{U}\left(\boldsymbol{k}=\mathbf{2}\right)%$≤3.5%范围内。对于S-Cs质，${\boldsymbol{R}}{\boldsymbol{k}}$约为$\boldsymbol{U}\left(\boldsymbol{k}=\mathbf{2}\right)$≤3.0%。应当指出，由于${\boldsymbol{k}}{\boldsymbol{TP}}$校正因子失效，ININ的不确定度通常较大，在此进行简要讨论。ISO 17043的${\boldsymbol{E}}{\boldsymbol{n}}$评分为此比较提供了统计支持。