标准摘要
[中文适用范围]： ISO 19232 的这一部分给出了确定图像质量值和图像质量表的说明。 如果由于 IQI 材料和被检材料的吸收系数相差超过 30% 等原因而无法使用 ISO 19232-3 中规定的 IQI 要求，则需要进行测试曝光以确定图像质量值的可接受性。 在相同射线照相条件下进行的所有曝光都需要通过测试曝光获得的图像质量值。 [外文原描述]： ISO 19232-4:2013 gives instructions for the determination of image quality values and image quality tables. If the IQI requirements specified in ISO 19232‑3 cannot be used because, for example, the absorption coefficients of the IQI material and the inspected material differ by more than 30 %, test exposures are necessary to determine acceptance of image quality values. The image quality values achieved by the test exposures are required for all exposures made under the same radiographic conditions.
英文名称Non-destructive testing — Image quality of radiographs — Part 4: Experimental evaluation of image quality values and image quality tables