ISO 9236-1:2004规定了医用射线照相用屏幕/胶片/胶片夹/处理系统单个样品感光曲线形状、平均梯度和速度的测定方法。它不适用于特殊的射线照相应用，如乳房X光摄影、牙科X光摄影和直接暴露的医疗射线照相系统（例如，参见ISO 5799）。 胶片夹可以是确保屏幕/胶片紧密接触并防止胶片暴露在环境光下的任何方式。尤其是，胶片夹可以是实验室中常用的不透光真空袋，也可以是医用射线照相中使用的射线照相盒。

ISO 9236-1:2004 specifies methods for the determination of the sensitometric curve shape, average gradient and speed of a single sample of a screen/film/filmholder/processing system for medical radiography. It is not applicable to special radiographic applications such as mammography, dental radiography and direct-exposing medical radiographic systems (see for example ISO 5799). The filmholder can be any means that ensures close screen/film contact and prevents the film from being exposed to ambient light. In particular, the filmholder can be a light-tight vacuum bag, as often used in the laboratory, or a radiographic cassette as used in medical radiography.