1.1 本规程涵盖了用于确定胶片射线照片或使用CR成像板、数字检测器阵列（DDA）或射线透视系统（例如，使用X射线图像增强器）拍摄的数字图像的图像不清晰度和基本空间分辨率的量规的设计和基本使用，用于Se-75、Ir-192、Co-60和具有管电位的高能量源的应用 ≥ 300 kV。如果预期的不清晰度>200，像质计也可以在较低的管电位下使用 µm( SR b 形象 或 SR b 探测器 >100 µm）。对于较低不清晰度值的测量，使用实践中描述的量规 E2002 建议使用。 1.2 本规程适用于利用X射线和伽马射线辐射源的射线照相和放射成像系统。 1.3 以国际单位制表示的数值应视为标准。本标准中不包括其他计量单位。 1.4 如果Practice的双线像质计 E2002 不能提供足够的对比度分辨率。 1.5 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ===意义和用途====== 5.1 该仪器旨在提供一种测量图像或检测器不清晰度和基本空间图像或检测器分辨率的方法，尽可能独立于成像系统和对比灵敏度限制。当双面板规直接放置在胶片上或数字检测器上而不是测试对象上时，则确定的图像不清晰度 U Im 对应于固有的胶片或探测器的不清晰度( U 探测器 )以及所确定的基本空间图像分辨率 SR b 形象 对应于基本空间探测器分辨率 SR b 探测器 。 SR b 形象 提供了取决于检测器不清晰度和几何不清晰度的组合效应的值。 5.2 申请依据: 5.2。 1. 以下项目受使用或引用本标准的各方之间的合同协议的约束。 5.2.1.1 人员资格-- 根据本规程进行考试的人员应符合NAS410、EN 4179、ANSI/ASNT CP 189、ISO 9712或SNT-TC-1A的要求，并经雇主或认证机构（如适用）认证。当合同或采购订单中有规定时，可以使用其他等效的资格证明文件。除非双方之间的合同协议中另有规定，否则适用的修订版应为最新版本。 5.2.1.2 如果合同协议中有规定，无损检测机构应按照规范中的规定进行资格鉴定和评估 E543 .规范的适用版本 E543 应在合同中规定。

1.1 This practice covers the design and basic use of a gauge used to determine the image unsharpness and the basic spatial resolution of film radiographs or of digital images taken with CR imaging plates, digital detector arrays (DDA), or radioscopic systems (for example, with X-ray image intensifiers) for applications with Se-75, Ir-192, Co-60 and high energy sources with tube potentials ≥ 300 kV. The IQI may be used at lower tube potentials too, if the expected unsharpness is > 200 µm ( SR b image or SR b detector > 100 µm). For the measurement of lower unsharpness values, the usage of the gauge described in Practice E2002 is recommended. 1.2 This practice is applicable to radiographic and radioscopic imaging systems utilizing X-ray and gamma ray radiation sources. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 The gauge described can be used effectively if the duplex wire IQI of Practice E2002 does not provide sufficient contrast resolution. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 The gauge is intended to provide a means for measuring image or detector unsharpness and basic spatial image or detector resolution as independently as practicable from the imaging system and contrast sensitivity limitations. When the duplex plate gauge is positioned directly on the film or the digital detector instead on the test object, then the determined image unsharpness U Im corresponds to the inherent film or detector unsharpness ( U detector ) and the determined basic spatial image resolution SR b image corresponds to the basic spatial detector resolution SR b detector . SR b image provides a value which depends on the combined effect of detector unsharpness and geometric unsharpness. 5.2 Basis of Application: 5.2.1 The following items are subject to contractual agreement between the parties using or referencing this standard. 5.2.1.1 Personnel Qualification— Personnel performing examinations to this practice shall be qualified in accordance with NAS410, EN 4179, ANSI/ASNT CP 189, ISO 9712, or SNT-TC-1A and certified by the employer or certifying agency as applicable. Other equivalent qualification documents may be used when specified on the contract or purchase order. The applicable revision shall be the latest unless otherwise specified in the contractual agreement between parties. 5.2.1.2 If specified in the contractual agreement, NDT agencies shall be qualified and evaluated as described in Specification E543 . The applicable edition of Specification E543 shall be specified in the contract.