CT检查个体化辐射剂量估算研究现状

Progress of patient size-specific dose estimation in CT examinations

2011年和2014年美国医学物理学会分别发布204号和220号报告,描述基于个体体征估算CT受检者的辐射剂量。204号报告介绍应用受检者前后径和左右径等描述个体体征,220号报告介绍用水当量直径描述受检者的体型特异性,利用体型特异性的转换因子估算CT扫描受检者体型相关的辐射剂量(SSDE)。近年来,国外一系列的文章在SSDE方面进行了深入的研究,本文首先介绍两则报告的主要内容,并对SSDE在儿童和成年人群CT检查诊断参考水平的制定、CT断层图像的质量、受检者器官剂量和有效剂量的估算方面的研究现状进行综述,为开展国内SSDE相关研究和应用提供参考。

American Association of Physicists in Medicine（AAPM） have published Reports 204 and 220 about size-specific dose estimation（SSDE） in CT examinations in 2011 and 2014,respectively. Antero-posterior dimension（APD） and lateral dimension（LD） have been used to represent the size of patient in Report 204,while Report 220 has used water-equivalent diameter to estimate the SSDE. In recent years,many papers on thorough SSDE studies have been published. In this review,we introduced the main contents of the two Reports,followed by an overview of the applications of SSDE in CT radiation protection,such as establishment of diagnostic reference levels of CT examinations,evaluation of image quality of CT,estimation of organ dose and effective dose of the patients,which can be adopted in the research and applications of SSDE in China.