1.1 本指南涵盖了数字中子图像的评估、鉴定和量化。这些图像可以通过多种方法获取，包括:中子敏感成像板（计算机射线照相-CR）、数字检测器阵列-DDA（非晶硅、CMOS、CCD等）、微通道板、中子敏感荧光镜、耦合到光学相机的中子敏感闪烁体、数字化射线照相胶片和线性二极管阵列。 1.2 本指南并不旨在确定什么是可接受的图像，但仅旨在提供数字中子成像的指导，以及重要的图像质量指标，以及如何测量和报告这些指标。 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 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。 1.5 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====== 4.1 目的-- 本文概述了使用数字中子探测器对含有中子的材料和部件进行射线照相检查的做法。它们旨在作为评估数字中子射线照片特性的指南。有关成像和胶片中子射线照相的中子束线的信息，请参阅指南 E748 。 4.2 限制-- 尚未制定任何材料或生产过程的验收标准。中子射线照相术，无论是通过反应堆、加速器、亚临界组件还是放射源进行的，只有在技术的所有细节（如中子源、准直、几何结构、成像系统等）一致的情况下，灵敏度和空间分辨率才会一致。 ，得到维护。本指南仅限于将数字中子探测器与中子转换材料结合用于图像记录。本指南适用于热中子谱和冷中子谱。指南中介绍了使用胶片和适当的转换屏幕制作热中子射线照片 E748 。 4.3 解释和验收标准-- 本指南不包括解释和验收标准。验收拒收标准的指定被认为在产品规范的范围内。 4.4 中子射线照相过程的其他方面-- 关于中子射线照相术的许多重要方面，如技术、文件、射线照片查看、射线照片存储、胶片处理和记录保存，请参阅指南 E94 ，涵盖了X射线照相术的这些方面。（参见第节 2. ）

1.1 This guide covers the evaluation, qualification, and quantification of digital neutron images. These images can be acquired by many methods, including: neutron sensitive imaging plates (Computed Radiography – CR), Digital Detector Arrays – DDA’s (amorphous silicon, CMOS, CCD, etc.), micro-channel plates, neutron sensitive fluoroscopes, neutron sensitive scintillators coupled to optical cameras, digitized radiographic films, and linear diode arrays. 1.2 This guide does not purport to establish what is considered an acceptable image but is intended to only give guidance on digital neutron imaging, as well as image quality metrics of importance, and how they can be measured and reported. 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 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. 1.5 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 Purpose— Practices to be employed for the radiographic examination of materials and components with neutrons using digital neutron detectors are outlined herein. They are intended as a guide for the assessment of a digital neutron radiograph’s characteristics. For information on neutron beam lines for imaging and film neutron radiography, refer to Guide E748 . 4.2 Limitations— Acceptance standards have not been established for any material or production process. Neutron radiography, whether performed by means of a reactor, an accelerator, subcritical assembly, or radioactive source, will be consistent in sensitivity and spatial resolution only if the consistency of all details of the technique, such as neutron source, collimation, geometry, imaging system, etc., are maintained. This guide is limited to the use of digital neutron detectors in combination with neutron conversion materials for image recording. This guide is intended for use with thermal and cold neutron spectrums. The production of thermal neutron radiographs by employing the use of film and appropriate conversion screens is covered in Guide E748 . 4.3 Interpretation and Acceptance Standards— Interpretat- ion and acceptance standards are not covered by this guide. Designation of accept-reject standards is recognized to be within the cognizance of product specifications. 4.4 Other Aspects of the Neutron Radiographic Process— For many important aspects of neutron radiography such as technique, files, viewing of radiographs, storage of radiographs, film processing, and record keeping, refer to Guide E94 , which covers these aspects for X-ray radiography. (See Section 2 .)