What is BS EN 62220-1-2 – Determination of detective quantum efficiency (DGE) about?
BS EN 62220 is a European standard that discusses the characteristics of digital X-ray imaging devices. BS EN 62220-1-2 outlines the method for the determination of the detective quantum efficiency (DGE) of digital X-ray imaging devices as a function of air kerma and spatial frequency for the working conditions in the range of the medical application as specified by the manufacturer to enhance digital X-ray imaging devices.
BS EN 62220-1-2 is restricted to digital X-ray imaging devices that are used for mammographic imaging such as but not exclusively, CR systems, direct and indirect flat-panel detector-based systems, scanning systems (CCD based or photon-counting).
Note 1: BS EN 62220-1-2 does not apply to:
- Digital x-ray imaging devices intended to be used in general radiography or dental radiography
- Computed tomography
- Devices for dynamic imaging (where series of images are acquired, as in fluoroscopic or cardiac imaging)
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 mammography. Some of these techniques are treated in separate standards (IEC 62220-1 and IEC 62220-1-3) as has been done for other topics, for instance, speed and contrast, in IEC and ISO standards.
Who is BS EN 62220-1-2 – Determination of detective quantum efficiency (DGE) for?
BS EN 62220-1-2 on the determination of the detective quantum efficiency (DGE) is useful for:
- Digital X-ray imaging devices manufacturers
- Medical laboratories
- Test laboratories
- Regulatory authorities
Why should you use BS EN 62220-1-2 – Determination of detective quantum efficiency (DGE)?
Digital x-ray imaging devices are increasingly used in medical diagnosis and widely replace conventional (analogue) imaging devices such as screen-film systems or analogue X-ray image intensifier television systems in the future.
Detective quantum efficiency is a ratio of two NPS functions with the numerator being the NPS of the input signal at the detector surface of a digital X-ray detector after having gone through the deterministic filter given by the system transfer function, and the denominator being the measured NPS of the output signal.
BS EN 62220-1-2 assists you with requirements on operating conditions, X-ray equipment, radiation quality, test device, geometry, and irradiation conditions for the proper functioning of digital X-ray imaging devices.
BS EN 62220-1-2 also guides on the determination of the detective quantum efficiency by providing parameters to be used for the evaluation determination of different parameters from the images. This assists in accurately determining the detective quantum efficiency (DGE) of digital X-ray imaging devices to enhance digital X-ray imaging devices.
With obedience and compliance to BS EN 62220-1-2, you can enhance the efficacy of digital X-ray imaging devices to manufacture a standardized device that has global acceptance in the market.
