Non-destructive testing — Industrial computed radiography with storage phosphor imaging plates — Part 1: Classification of systems
无损检测——具有存储磷光体成像板的工业计算机射线照相术Spart 1:系统分类
发布日期:
2011-09-13
ISO 16371-1:2011规定了计算机射线照相系统的基本参数,旨在经济地获得令人满意且可重复的结果。这些技术基于基本理论和测试测量。ISO 16371-1:2011规定了计算机射线照相(CR)系统的性能,以及系统扫描仪和存储磷光体成像板(IP)的相应参数测量。它描述了这些系统的分类,以及用于工业射线照相的特定金属屏。它的目的是确保图像的质量,因为这是由扫描仪的影响-
IP系统,符合ISO 16371-2的要求。ISO 16371-1:2011涉及ISO 11699-1中定义的胶片射线照相要求。
ISO 16371-1:2011定义了不同级别的系统测试。描述了更复杂的测试,可以确定精确的系统参数。它们可用于对不同供应商的系统进行分类,并使其对用户具有可比性。这些试验被指定为制造商试验。其中一些需要特殊工具,用户实验室通常不提供这些工具。因此,还描述了更简单的用户测试,其设计用于快速测试CR系统的质量和长期稳定性。
影响CR图像质量的因素包括几何不清晰度、信噪比、散射和对比度灵敏度。还有几个其他因素(例如扫描参数)会影响使用光学扫描仪准确读取曝光IP上的图像。
ISO 16371-1:2011中所述的制造商测试可最准确地确定质量系数。针对实际用户测试推荐的单个测试目标,描述了质量保证。这些试验可以单独进行,也可以使用CR模型(附录B)进行。
该CR模型包含许多基本质量评估方法,以及与CR系统(包括扫描仪)正确运行相关的方法,用于读取暴露的板,并正确擦除IP,以便将来使用每个板。
ISO 16371-1:2011中的CR系统等级不涉及任何特定制造商的成像板。CR系统类别是使用特定成像板以及曝光条件(尤其是总曝光)、扫描仪类型和扫描参数的结果。
ISO 16371-1:2011 specifies fundamental parameters of computed radiography systems with the aim of enabling satisfactory and repeatable results to be obtained economically. The techniques are based both on fundamental theory and test measurements. ISO 16371-1:2011 specifies the performance of computed radiography (CR) systems and the measurement of the corresponding parameters for the system scanner and storage phosphor imaging plate (IP). It describes the classification of these systems in combination with specified metal screens for industrial radiography. It is intended to ensure that the quality of images, as far as this is influenced by the scanner-IP system, is in conformity with the requirements of ISO 16371-2. ISO 16371-1:2011 relates to the requirements of film radiography defined in ISO 11699-1.
ISO 16371-1:2011 defines system tests at different levels. More complicated tests are described, which allow the determination of exact system parameters. They can be used to classify the systems of different suppliers and make them comparable for users. These tests are specified as manufacturer tests. Some of them require special tools, which are usually not available in user laboratories. Therefore, simpler user tests are also described, which are designed for a fast test of the quality of CR systems and long term stability.
There are several factors affecting the quality of a CR image including geometrical un-sharpness, signal/noise ratio, scatter and contrast sensitivity. There are several additional factors (e.g. scanning parameters), which affect the accurate reading of images on exposed IPs using an optical scanner.
The quality factors can be determined most accurately by the manufacturer tests as described in ISO 16371-1:2011. Individual test targets, which are recommended for practical user tests, are described for quality assurance. These tests can be carried out either separately or by the use of the CR Phantom (Annex B). This CR Phantom incorporates many of the basic quality assessment methods and those associated with the correct functioning of a CR system, including the scanner, for reading exposed plates and in correctly erasing IPs for future use of each plate.
The CR System classes in ISO 16371-1:2011 do not refer to any particular manufacturer's Imaging Plates. A CR system class results from the use of a particular imaging plate together with the exposure conditions (particularly total exposure), the scanner type and the scanning parameters.