ASTM E1936用于评估射线照相数字化系统性能的E1936标准参考射线图谱
RRE1936用于评估射线照相数字化系统性能的E1936标准参考射线照相的附件

该参考射线照片提供了一系列测试目标，以提供用于评估空间分辨率、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的载体。测试目标适用于评估空间分辨率低至1/1000英寸（25微米（μ））、密度对比灵敏度低至0.02光密度（OD）、密度范围为0.5至4.5 OD、胶片尺寸容量为14英寸（355毫米）宽乘17英寸（431毫米）长的数字化系统。参考射线照片具有五种类型的目标，这些目标可用于评估数字化系统的各种参数。目标位于≈3.0 OD的背景密度内。参考射线照片分为三个区域，尺寸分别为8英寸（203 mm）乘10英寸（254 mm）、11英寸（279 mm）乘14英寸（355 mm）和14英寸（355mm）乘17英寸（430 mm）。这些是为无法容纳14英寸乘17英寸胶片尺寸的数字化系统而创建的。

参考射线照片是公认的无损检测标准，因为它们在验收-拒收操作中具有很高的可靠性。

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 (μ)) 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. The reference radiograph has five types of targets that may be used to evaluate various parameters of the digitization system. The targets are located within a background density of ≈ 3.0 OD. The reference radiograph is divided into three areas with sizes of 8 in. (203 mm) by 10 in. (254 mm), 11 in. (279 mm) by 14 in. (355 mm), and 14 in. (355 mm) by 17 in. (430 mm). These have been created for digitization systems unable to accommodate film sizes up to 14 in. by 17 in.

Reference Radiographs are nondestructive testing standards universally accepted because of their high reliability in accept-reject actions.