Medical electrical equipment – Characteristics of digital X-ray imaging devices – Part 1-3: Determination of the detective quantum efficiency – Detectors used in dynamic imaging
|Publication Date:||1 June 2008|
|ICS Code (Radiographic equipment):||11.040.50|
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 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 Part 1-3 is restricted to DIGITAL X-RAY IMAGING DEVICES that are used for dynamic imaging such as, but not exclusively, direct and indirect flat panel-detector based systems.
It is not recommended to use this part of IEC 62220 for digital X-RAY IMAGE INTENSIFIER-based systems.
NOTE 1 This negative recommendation is based on the low frequency drop, vignetting and geometrical distortion present in these devices which may put severe limitations on the applicability of the measurement methods described in this standard.
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; and
- systems in which the X-ray field is scanned across the patient.
NOTE 2 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 dynamic imaging. Some of these techniques are treated in separate standards (IEC 62220-1 and IEC 62220-1-2).