标准摘要
[中文适用范围]: IEC 62220 的这一部分规定了确定数字 X 射线成像设备的探测量子效率 (DQE) 的方法,该效率是 AIR KERMA 和空间频率的函数,适用于医疗应用范围内的工作条件,如生产厂家。 IEC 62220 这部分的目标用户是制造商和设备齐全的测试实验室。注 1:虽然不建议@应用本标准来确定集成在临床系统中的数字 X 射线成像设备的 DQE,但只要遵守本标准中规定的要求,就不排除这种情况。其他注意点可以是(例如但不限于)建立所需的辐射质量@最大限度地减少散射和背向散射辐射的影响@精确的空气比动能测量@测试设备的定位@是否有防护罩@去除抗辐射剂-分散网格。本第 1-1 部分仅限于用于放射线成像的数字 X 射线成像设备,例如@但不限于@CR 系统@基于直接和间接平板探测器的系统。不建议将 IEC 62220 的这一部分用于基于数字 X 射线图像增强器的系统。注 2:不鼓励将本标准用于基于 X 射线图像增强器的系统,因为这些设备中存在低频渐晕和几何畸变,这可能会严重限制本标准中描述的测量方法的适用性。 IEC 62220 的本部分不适用于: - 用于乳房 X 线摄影或牙科放射线摄影的数字 X 射线成像设备; - 槽扫描数字 X 射线成像设备;- - 计算机断层扫描; - 动态成像设备(在荧光透视或心脏成像中采集一系列图像)。注 3:上述设备被排除在外,因为它们包含许多与放射学重要参数不同的参数(例如@光束质量@几何形状@时间依赖性@等)。其中一些技术在 IEC 62220 标准的其他部分(IEC 62220-1-2 和 IEC 62220-1-3)中进行了处理。 [外文原描述]: IEC 62220-1-1:2015 specifies the method for the determination of the DETECTIVE QUANTUM EFFICIENCY (DQE) of DIGITAL X-RAY IMAGING DEVICES as a function of AIR KERMA and of SPATIAL FREQUENCY for the working conditions in the range of the medical application as specified by the MANUFACTURER. The intended users of this part of IEC 62220 are manufacturers and well equipped test laboratories. This first edition of IEC 62220-1-1 cancels and replaces IEC 62220-1:2003. It constitutes a technical revision of IEC 62220-1:2003 and assures a better alignment with the other parts of the IEC 62220 series. The main changes are as follows: - necessary modifications have been applied as a consequence of taking into account IEC 61267:2005. This influences HVL values and SNRin2; - the method for the determination of LAG EFFECTS now considers lag and ghosting compensation; - as part of the MTF determination, the method of obtaining the final averaged MTF has been restricted (only averaging of the ESF is allowed); - a description of (optionally) obtaining the diagonal (45°) MTF and NPS has been added.
英文名称Medical electrical equipment - Characteristics of digital X-ray imaging devices - Part 1-1: Determination of the detective quantum efficiency - Detectors used in radiographic imaging