DR设备利用信号传递特性得出准确剂量指示质量控制方法的研究  

Research on the method of detector dose indication detection by using signal transfer property in DR equipment

作　　者：李杰军[1] 程远达[1] 高艳辉 王雷[1] 赵红枫[1] LI Jiejun;CHENG Yuanda;GAO Yanhui;WANG Lei;ZHAO Hongfeng(Department of Radiological Health,Chaoyang District Center for Disease Control and Prevention of Beijing,Beijing 100021,China)

机构地区：[1]北京市朝阳区疾病预防控制中心放射卫生科,北京100021

出　　处：《影像研究与医学应用》2024年第5期19-21,25,共4页Journal of Imaging Research and Medical Applications

基　　金：2023年北京市朝阳区放射卫生监测项目(朝卫通字[2023]110号)。

摘　　要：目的:探究数字X射线摄影(DR)设备利用信号传递特性(STP)得出准确探测器剂量指示(DDI)的质量控制方法。方法:通过STP绘制拟合回归曲线,得出剂量与DDI值或像素值的计算公式,计算得出影像接收器入射空气比释动能10μGy对应的基线值。结果:SYNTHESIS型DR摄影机的剂量与像素值对数相关公式为y=-1455ln(x)+7311.1,回归到剂量x=10μGy,得出像素值y=3961。Brivo XR515型DR摄影机的剂量与像素值线性响应公式为y=140.33x-2.3445,回归到剂量x=10μGy,得出准确的像素值y=1401。结论:此方法可以准确地完成DR设备验收检测和状态检测的DDI项目,并得到客观准确的评价。Objective To explore the quality control method for accurate detector dose indicator(DDI)using signal transfer property(STP)in digital radiography(DR)equipment.Methods Use STP to fit the regression curve and obtain the formula for calculating the dose and DDI value or pixel value.Calculate the baseline value corresponding to the incident air release energy of the image receiver at 10μGy.Results The logarithmic correlation formula between dose and pixel value of SYNTHESIS DR camera is y=-1455ln(x)+7311.1,regressing to dose x=10μGy,the pixel value y=3961.The linear response formula between dose and pixel value for the Brivo XR515 DR camera is y=140.33x-2.3445,regressing to dose x=10μGy,obtain the accurate pixel value y=1401.Conclusion This method can accurately complete the DDI project of DR equipment acceptance testing and status detection,and obtain objective and accurate evaluation.

关 键 词：数字X射线摄影 质量控制 验收检测 探测器剂量指示 信号传递特性 DR基线值 

分 类 号：R445.4[医药卫生—影像医学与核医学]