数字射线检测技术专题(六)——等价性问题讨论

Digital RadiographyⅥ: A Discussion on the Equivalence of the Defect Detectivity of Digital Radiography with Radiography

摘要: 从成像过程基本理论，给出了等价性问题概念，具体讨论了等价性指标、等价性级别问题，给出了等价性范围讨论的思路、方法，并以矩形函数近似扩散函数为例，说明了讨论等价性厚度范围的过程。

Abstract: The concept on equivalence on the basic theory of imaging process was given. The discussion on the index and class of equivalence was carried out. The approach and method for discussion on the scope of equivalence was established. The process of discussion on the thick scope of equivalence was described with the sample in which the spread function of imaging system was similar to square pulse function.