1.1 该参考射线照片涵盖了一系列测试目标，适用于评估、量化和记录射线数字化过程或电子图像重建过程或两者的性能参数。该参考射线照片可用于数字化系统的视觉和电子分析。 1.2 该参考射线照片提供了一系列测试目标，为评估空间分辨率、密度对比灵敏度、动态范围和空间线性以及数字化系统的其他方面提供了载体。测试目标适用于评估空间分辨率低至的数字化系统 ∼ 1/1000英寸。(25 微米（μm）），密度对比灵敏度降至0.02光密度（OD），密度范围为0.5至4.5 OD，薄膜尺寸容量为14英寸。（355毫米）宽x 17英寸。(431 mm）长。 1.3 不时地，参考辅助膜的制造工艺可能会有微小变化。这些变化可能包括所用胶片或加工化学的变化、胶片上的文字名称等。；然而，在所有情况下，插图监测小组委员会都会审查这些更改，以确保参考图像的功能使用没有变化。 因此，无论文本标准的生产日期或修订水平如何，附加参考膜均适用于本标准。 1.4 单位- 以英寸-磅单位表示的值应视为标准值，但空间分辨率目标除外( 6.2 和 6.7 )以国际单位制表示。 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）。本标准的用户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（TBT）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》中确立的国际公认标准化原则制定的。

1.1 This reference radiograph covers a series of test targets suitable for evaluating, quantifying, and documenting performance parameters of the radiographic digitization process or the electronic image reconstruction process, or both. This reference radiograph can be used for visual and electronic analysis of digitization systems. 1.2 This reference radiograph provides a series of test targets to provide a vehicle for the evaluation of spatial resolution, density contrast sensitivity, dynamic range, and spatial linearity, as well as other aspects of a digitization system. The test targets are suitable for evaluating a digitization system with a spatial resolution down to ∼ 1/1000 in. (25 micrometres (μm)), a density contrast sensitivity down to 0.02 optical density (OD), a density range of 0.5 to 4.5 OD, and a film size capacity of 14 in. (355 mm) wide by 17 in. (431 mm) long. 1.3 From time to time, there may be minor changes to the process for manufacturing of the reference adjunct film. These changes could include changes in the films or processing chemistry used, text designation on the film, etc.; however, in all cases, these changes are reviewed by the Illustration Monitoring Subcommittee to ensure that there are no changes to the functional use of the reference image. Therefore, the adjunct reference films remain valid for use with this standard regardless of the date of production or the revision level of the text standard. 1.4 Units— The values stated in inch-pound units are to be regarded as the standard, with the exception of the spatial resolution targets ( 6.2 and 6.7 ) which are stated in SI units. 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.