主要介绍对GB/T 37910.1-2019《焊缝无损检测射线检测验收等级第1部分：钢、镍、钛及其合金》标准的适用范围、验收等级、缺欠类型、评定区划分、缺欠评定等几个方面的理解和应用。该标准适用于胶片法和数字法检测技术影像的缺欠评定，传统胶片法为负像影像显示，而大多数字法技术设备软件具有影像正像显示和负像显示的功能，可根据使用者习惯切换，评定时应注意两种检测技术影像正像显示和负像显示的图像差异。

The understanding and application of GB/T37910.1-2019 Nondestructive testing of welds. radiographic acceptance level. part 1: steel, nickel, titanium and their alloys standard is introduced mainly from the scope of application, acceptance level, defect type, evaluation area division, defect assessment, etc. The standard is suitable for the evaluation of the defect of technical images of the film method and the digital method. The traditional film method is negative image display, and most of the font technology equipment software has the function of image positive and negative image display, which can be switched according to user habits. During the evaluation, attention should be paid to the difference between the positive and negative images of the two detection technologies.