医用成像部门的评价及例行试验.第2-6部分:稳定性试验.计算机断层摄影X射线设备的成像性能

[中文适用范围]： IEC 61223 的这一部分提供了在 CT 扫描仪上执行稳定性测试的帮助。它适用于影响图像质量、患者剂量和定位的 CT 扫描仪组件。该标准定义了描述 CT 扫描仪在图像质量、患者剂量和定位方面的性能的基本参数；待测参数列表见4.5节； – 定义测试基本参数的方法； – 提供了用于评估数据是否符合随附文件规定的参数容差以及基线值的标准。这些方法依赖于使用适当的测试设备进行非侵入性测量，以确保设备的功能性能符合既定标准或能够及早识别设备组件属性的变化。目的是验证是否符合影响图像质量、患者剂量和患者定位的规范。它无意于考虑： – 机械和电气安全方面，也 – 机械、电气和软件性能方面，除非它们对于执行稳定性测试至关重要并直接影响图像质量、患者剂量和定位。 [外文原描述]： This part of IEC 61223 provides assistance in performing constancy tests on a CT scanner. It applies to those components of CT scanners which influence the image quality, patient dose and positioning. This standard - defines the essential parameters which describe the performance of CT scanners with regard to image quality, patient dose and positioning; the list of parameters to be tested can be found in section 4.5; - defines the methods of testing the essential parameters; - provides criteria to be applied in the evaluation of data for compliance with the tolerances of the parameters specified by the accompanying documents and with respect to baseline values. These methods rely on non-invasive measurements, using appropriate test equipment, performed to ensure that the functional performance of equipment meets established criteria or to enable the early recognition of changes in the properties of components of the equipment. The aim is to verify compliance with specifications affecting the image quality, patient dose and patient positioning.