本规范涵盖了一种高对比度、细粒度的射线照相胶片，其形式为切割片或卷，当正确使用时，该胶片将提供1-1T灵敏度的射线照相质量水平。

This specification covers one type of high-contrast, fine-grain radiographic film in the form of cut sheets, or rolls, This film will provide a radiographic quality level of 1-1T sensitivity when properly utilized.