讨论了数字射线照相技术的特性，研究了ISO17636-2标准对数字射线照相技术相关指标和工艺的规定，重点分析了三个补偿原则，最小灰度值的确定，几何放大技术的作用和意义，并通过试验进一步验证、理解标准有关条文，分析数字射线照相技术在工业领域运用的技术障碍及解决办法，阐述数字射线照相技术发展趋势。

The characteristics of digital radiography, and indicators and process requirements of digital radiography in ISO17636-2 are discussed in this paper, in which we focus on three principles of compensation, the determination of the minimum gray value, the roles and significance of geometric enlargement. And some experiments were done to verify and acknowledge the relevant provisions of the standard. Barriers and solutions of industrial application of digital radiography technology are analyzed. In the end, the trends of digital radiography are discussed.