关于JJG 1078-2012规程中的几个问题讨论  

Discussion on JJG 1078-2012

作　　者：范杰[1] 李明豫 董凤华[1] 杨波[1] 

机构地区：[1]中国测试技术研究院,四川成都610021 [2]遵义市产品质量检验检测院,贵州遵义563099

出　　处：《中国测试》2013年第S2期102-104,共3页China Measurement & Test

摘　　要：该文对JJG 1078-2012《医用数字摄影(CR、DR)系统X射线辐射源》规程中的计算图像均匀性方法和低对比度分辨力模体及衰减模体的等效材料问题进行讨论,得出两个结论:(1)图像均匀性计算方法采用图像处理软件测量需拟合出灰度-剂量曲线,方能作为判断图像均匀性的结果,(2)低对比度分辨力模体及衰减模体如采用铜等效材料,需要考虑的因素很多(比如厚度值很难确定,低对比度值范围很小),不能作为提供质控或计量检测的标准模体。In this article, the calculation of image uniformity and equivalent materials of low contrast resolution phantom and attenuation phantom are discussed for JJG 1078-2012 X-ray Radiation Sources for Medical Computed Radiography System and Digital Radiography System. Two conclusions are obtained:(1)image uniformity can be judged as a result when its calculation method used image processing software to measure and fit gray-dose curve;(2)if low contrast resolution phantom and attenuation phantom uses copper equivalent material, much more factors need to be considered(such as the thickness value is difficult to determine,low contrast value range is very small,and so on.),and the copper equivalent material can't be quality control or measurement phantom.

关 键 词：JJG 1078-2012 CR DR 质量控制 

分 类 号：R812[医药卫生—放射医学]