1.1 本标准是一份用户指南，旨在作为选择和使用各种数字探测器阵列系统的指南，这些系统通常由探测器阵列和成像系统组成，以执行数字射线照相。本指南还可作为以下标准的详细参考:实践 第597页 , 698年 和 2007年 . 1.2 本标准并不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建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.3 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《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 4.1 本标准为其他DDA标准提供了指南（参见实践 第597页 , 698年 和 2007年 ). 它不适用于计算机射线照相设备。图1 描述了本标准如何与上述标准相关。 图1 表示四个DDA标准之间连接的流程图 4.2 本指南旨在帮助用户理解相关标准中使用的定义和相应性能参数，如 4.1 以便就如何在目标应用中使用给定DDA做出明智的决定。 4.3 本指南还旨在帮助认可的工程官员、主要制造商、，以及一般服务和制造客户群，这些客户群可能依赖数字检测器检测器提供先进的放射性结果，以便这些方可以为供应商和商店使用这些数字检测器检测器设置自己的验收标准，以验证其零件和结构是否完好，从而投入使用。 4.4 DDA的制造商特性标准（见实施规程 第597页 )作为最终用户为手头的特定应用程序选择DDA的起点。数字检测器阵列制造商和系统集成商将使用实践中规定的标准几何结构、X射线束光谱和模型提供数字检测器阵列性能数据 第597页 。最终用户将查看这些性能结果，并比较不同制造商的DDA指标，并决定一种符合最终用户检查所需规范的DDA。参见章节 5. 和 8. 讨论特定应用的DDA的特性测试和选择指南。 4.5 实践 698年 旨在帮助最终用户按照放射检查的最低要求设置DDA。该标准还将帮助用户获得所需的SNR，设置所需的放大率，并为射线照片的查看和存储提供指导。 还增加了讨论，以帮助用户在放射检查期间标记和识别零件。 4.6 实践 2007年 旨在帮助最终用户进行一系列测试，从而确认数字检测器阵列性能的稳定性。本文件提供了支持本标准的其他指南。 4.7 图1 提供了这四个数字检测器阵列标准的互连性概述。 4.8 如果配置得当，DDA可在较宽的能量范围（即10 kV至20 MeV）下成功使用。然而，在本文件中，一些幻象，如双工线规（实践 2002年 )在能量高于600kV时，可能不能给出基本空间分辨率的精确表示。

1.1 This standard is a user guide, which is intended to serve as a tutorial for selection and use of various digital detector array systems nominally composed of the detector array and an imaging system to perform digital radiography. This guide also serves as an in-detail reference for the following standards: Practices E2597 , E2698 , and E2737 . 1.2 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. 1.3 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 ====== 4.1 This standard provides a guide for the other DDA standards (see Practices E2597 , E2698 , and E2737 ). It is not intended for use with computed radiography apparatus. Figure 1 describes how this standard is interrelated with the aforementioned standards. FIG. 1 Flow Diagram Representing the Connection Between the Four DDA Standards 4.2 This guide is intended to assist the user to understand the definitions and corresponding performance parameters used in related standards as stated in 4.1 in order to make an informed decision on how a given DDA can be used in the target application. 4.3 This guide is also intended to assist cognizant engineering officers, prime manufacturers, and the general service and manufacturing customer base that may rely on DDAs to provide advanced radiological results so that these parties may set their own acceptance criteria for use of these DDAs by suppliers and shops to verify that their parts and structures are of sound integrity to enter into service. 4.4 The manufacturer characterization standard for DDA (see Practice E2597 ) serves as a starting point for the end user to select a DDA for the specific application at hand. DDA manufacturers and system integrators will provide DDA performance data using standardized geometry, X-ray beam spectra, and phantoms as prescribed in Practice E2597 . The end user will look at these performance results and compare DDA metrics from various manufacturers and will decide on a DDA that can meet the specification required for inspection by the end user. See Sections 5 and 8 for a discussion on the characterization tests and guidelines for selection of DDAs for specific applications. 4.5 Practice E2698 is designed to assist the end user to set up the DDA with minimum requirements for radiological examinations. This standard will also help the user to get the required SNR, to set up the required magnification, and provides guidance for viewing and storage of radiographs. Discussion is also added to help the user with marking and identification of parts during radiological examinations. 4.6 Practice E2737 is designed to help the end user with a set of tests so that the stability of the performance of the DDA can be confirmed. Additional guidance is provided in this document to support this standard. 4.7 Figure 1 provides a summary of the interconnectivity of these four DDA standards. 4.8 DDAs may be used with significant success under a wide energy range, i.e. from 10 kV to 20 MeV if configured appropriately. However in this document some phantoms such as the duplex wire gauge (Practice E2002 ) may not give an accurate representation of the basic spatial resolution at energies above 600 kV.