本文件已被宣布为“稳定”，不再接受货币定期审查。用户负责验证参考资料和持续适用性或技术要求。新技术可能存在。本航空航天标准建立了一个识别系统，并在描述两个系列的图像质量指示器时提供了设计和公差信息，这两个系列的图像质量指示器目前用于航空航天部件的射线照相，尤其是在电子部件评估和射线照相胶片和纸张分类中。单个图像质量指示器（IQI）通过使用该标准编号进行分类，然后使用适当的代码。分类系统的概要是:AS 1613-A-XX像质计，带有六根钨丝；和1613-B-XX像质计一样，有六根钨丝和六根铅珠。

This document has been declared "Stabilized" and will no longer be subjected to periodic reviews for currency. Users are responsible for verifying references and continued suitability or technical requirements. New technology may exist.This Aerospace Standard establishes an identification system and provides design and tolerance information in describing two series of image quality indicators currently used in radiography of aerospace components, especially in electronic component evaluation and radiographic film and paper classification. Individual image quality indicators (IQIs) are classified by use of this standard number, followed by appropriate codes. Synopsis of the classification system is: AS 1613-A-XX IQI, with six tungsten wires; and AS 1613-B-XX IQI, with six tungsten wires and six lead beads.