医用CT剂量指数影响因素研究及不确定度评定

Study on influence factors and uncertainty evaluation of medical CT dose indes

随着放射技术的发展,医用CT机数量的增多,病人受到的剂量(国内外一般用CTDIvol来表征受检者的剂量)越来越引起普遍的关注。新的检测技术(比如多通道技术)的应用,提高剂量指数的检测效率,为现场检测提供便利的同时也增加了一些新的不确定因素,该文对于CT剂量指数测量过程中可能的影响因素进行了研究,并设计了相应的实验,简要给出了CT剂量指数测量不确定度评定示例。

With the development of radiation technology and the increase of the number of medical CT,the dose absorbed by patients(CTDIvol is generally used to represent the dose of patients at home and abroad)has attracted more and more attention.The application of new detection technology(such as multi-channel technology)improves the detection efficiency of CTDI,provides convenience for on-site testing,but also adds some new uncertainties.This paper studies the possible influence factors in the process of CTDI measurement,designs corresponding experiments,and gives a brief example of uncertainty evaluation of CTDI.