该欧洲标准规定了直到并包括500 kV管电压的工业X射线系统的焦斑尺寸的测量。它描述了一种使用高度准直的接收器直接机械扫描0.1 mm以上焦点的方法。 X射线图像的图像质量和分辨率高度依赖于焦点的特征，特别是尺寸和二维强度分布

This European standard specifies the measurement of focal spot dimensions of industrial X-ray systems up to and including 500 kV tube voltage. It describes a method of direct mechanical scanning of focal spots above 0,1 mm with a highly collimated receiver. The image quality and the resolution of X-ray images depend highly on the characteristics of the focal spot, in particular the size and the two-dimensional intensity distribution.