数字射线检测稳定性试验方法的探讨

A Discussion of The Stability Test Method for Digital Radiography

在分析相关标准对数字射线检测系统周期性性能测试项目、测试方法和部分项目容差要求所作规定的基础上,提出了一种应用3σ原理的统计过程控制,进行数字探测器阵列系统性能长期稳定性试验中信噪比、空间分辨率、对比度-噪声比(或对比度-灵敏度)容差要求制定的方法,供探讨。

On the basis of analyzing stipulations for digital radiography system periodic performance test items, test methods and some items’ limits in relevant standard practices, a method of applying three sigma principle’s statistical process control to establish limits of signal to noise ratio, spatial resolution and contrast to noise ratio(or contrast sensitivity) for digital detector arrays system performance long-term stability test is proposed for reference.