1.1本规程描述了数字探测器阵列（DDA）的评估，并确保有一个通用标准用于数字探测器阵列的定量比较，以便选择适当的数字探测器阵列以满足无损检测要求。 1.2本规程旨在供DDA制造商或集成商使用，以提供DDA特性的定量结果，供NDT用户或买方使用。其中一些测试需要专门的测试模型，以确保供应商或制造商之间结果的一致性。这些测试不是为了让用户完成，也不是为了进行长期稳定性跟踪和寿命测量。然而，如果需要的话，它们可以用于此目的。 1.3根据本标准报告的结果应基于一组特定型号的至少三个单独探测器。 1.4以国际单位制或英寸-磅单位表示的数值应单独视为标准值。 每个系统中规定的值可能不是精确的等效值；因此，每个系统应相互独立使用。将两个系统的值合并可能会导致不符合标准。 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和健康实践，并确定监管限制的适用性。 ====意义和用途====== 4.1本规程提供了一种在一组常见技术测量上比较DDA的方法，认识到在实践中，即使使用不同的DDA、给定的几何放大率或其他可能弥补设备一个缺点的工业放射学设置，也可以进行调整以获得类似的结果。 4.2用户必须理解本实践中使用的定义和相应的性能参数，以便就如何在目标应用中使用给定的DDA做出明智的决定。 4.3将为每个DDA评估的因素为:插值基本空间分辨率( iSR公司 b 探测器 )，效率（检测器 信噪比 -归一化( dSNRn )在1 mGy时，对于不同的能量和光束质量），可实现的对比灵敏度( CSa公司 )，具体材料厚度范围( SMTR )、图像延迟、老化、不良像素和内部散射辐射( ISR公司 ).

1.1 This practice describes the evaluation of Digital Detector Arrays (DDAs), and assures that one common standard exists for quantitative comparison of DDAs so that an appropriate DDA is selected to meet NDT requirements. 1.2 This practice is intended for use by manufacturers or integrators of DDAs to provide quantitative results of DDA characteristics for NDT user or purchaser consumption. Some of these tests require specialized test phantoms to assure consistency among results among suppliers or manufacturers. These tests are not intended for users to complete, nor are they intended for long term stability tracking and lifetime measurements. However, they may be used for this purpose, if so desired. 1.3 The results reported based on this standard should be based on a group of at least three individual detectors for a particular model number. 1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 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 and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== 4.1 This practice provides a means to compare DDAs on a common set of technical measurements, realizing that in practice, adjustments can be made to achieve similar results even with disparate DDAs, given geometric magnification, or other industrial radiologic settings that may compensate for one shortcoming of a device. 4.2 A user must understand the definitions and corresponding performance parameters used in this practice in order to make an informed decision on how a given DDA can be used in the target application. 4.3 The factors that will be evaluated for each DDA are: interpolated basic spatial resolution ( iSR b detector ), efficiency (Detector SNR -normalized ( dSNRn ) at 1 mGy, for different energies and beam qualities), achievable contrast sensitivity ( CSa ), specific material thickness range ( SMTR ), image lag, burn-in, bad pixels and internal scatter radiation ( ISR ).