BS EN 62220-1-2004 医疗电气设备.数字X光成像设备特性.量子检测效率的确定

标准号：BS EN 62220-1-2004
中文标准名称：医疗电气设备.数字X光成像设备特性.量子检测效率的确定
英文标准名称：Medical electrical equipment. Characteristics of digital X-ray imaging devices. Determination of the detective quantum efficiency
标准类型：C43
发布日期：2004/2/2 12:00:00
实施日期：2004/2/2 12:00:00
中国标准分类号：C43
国际标准分类号：11.040.50
适用范围：This part of IEC 62220 specifies the method for the determination of the DETECTIVE QUANTUM EFFICIENCY (DQE) of DIGITAL X-RAY IMAGING DEVICES as a function of exposure and of SPATIAL FREQUENCY for the working conditions in the range of the medical application as specified by the MANUFACTURER. This part of IEC 62220 is applicable to projection DIGITAL X-RAY IMAGING DEVICES producing IMAGES in digital format that are used for medical diagnosis. It is restricted to DIGITAL X-RAY IMAGING DEVICES that are used for radiographic imaging, such as CR systems, selenium-based systems, flat panel detectors, optically coupled CCD detectors, and digital X-RAY IMAGE INTENSIFIERS used for single exposures. This part of IEC 62220 is not applicable to - DIGITAL X-RAY IMAGING DEVICES intended to be used in mammography or in dental radiography; - COMPUTED TOMOGRAPHY: - systems in which the X-ray field is scanned across the patient; and - devices for dynamic imaging (where series of images are acquired, as in fluoroscopic or cardiac imaging). NOTE The devices noted above are excluded because they contain many parameters (for instance, beam qualities, geometry, time dependence, etc.) which differ from those important for general radiography. It is intended to treat some of these techniques in separate standards as has been done for other topics, for instance for speed and contrast, in IEC and ISO standards.