数字射线检测技术(四)——等价技术级别评定

Digital Radiography IV:The Equality Evaluation on the Radiological Testing Technical Classification

按照射线检测技术基本理论,等价技术级别的基本要求是二者的检测图像质量具有同等的对比度、灵敏度和不清晰度。评定等价技术级别的基本过程,应包括工件分析、探测器系统基本性能测定、数字射线检测系统的检验试验和分析评定。给出了数字射线检测技术级别替代胶片检验技术级别的具体评定过程实例。

The basic requirement for the equality is the equal contrast and unsharpness of the testing image between a digital radiological technical classification and a film radiological technical classification on the basic theory of radiography.The procedure for the equality evaluation consists of the analysis on product,determining essential performance of the detetor system,inspection test with the digital radiographic system and deciding the equality.An example was given which showed the practical evaluation procedures for the substitution of the technical classification of digital radiography for the technical classification of film radiography.