ABSTRACT. The international standard IEC defines the measurement procedure for determination of the detective quantum efficiency (DQE) of digital. Measurement of the detective quantum efficiency in digital detectors consistent with the IEC standard: practical considerations regarding the choice of. In IEC (IEC, ) the average MTF was determined by averaging the multiple MTF results obtained from the individual groups of N consecutive lines.
|Published (Last):||23 April 2011|
|PDF File Size:||18.63 Mb|
|ePub File Size:||14.47 Mb|
|Price:||Free* [*Free Regsitration Required]|
Find Similar Items This product falls into the following categories. Characteristics of digital X-ray imaging devices – Part 1: Determination of the detective quantum efficiency.
Ic in Username Password Forgot your password?
A subsequent evaluation of ultrahigh purity aluminum, purchased from a second source, suggests, that reduced grain size can be achieved by the process of annealing. The faster, easier way to work with standards. Please download Chrome or Firefox or view our browser tips.
Medical electrical equipment – Characteristics of digital X-ray imaging devices – Part We will discuss problems encountered using ultra-high purity aluminum filtration for DQE evaluations.
IEC | IEC Webstore
However, images acquired with this sample demonstrated striated defects attributed to the manufacturing method, which would preclude its use in radiographic imaging applications. Clinical investigation instruments, Medical equipment, Electrical medical equipment, X-ray apparatus, Medical radiography, Diagnosis medical622201- equipment, X-rays, Electronic equipment and components, Digital signals. This low frequency mottle significantly overestimates the NPS at low frequencies, which in turn will cause an under-estimation of the low frequency DQE.
The intended users of this part of IEC are manufacturers and well equipped test laboratories.
BS EN 62220-1-1:2015
Take the smart route to manage medical device compliance. This Part 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.
Determination of the detective quantum efficiency, specifying how the DQE should be measured and computed. Characteristics of digital x-ray imaging devices.
IEC Standard – Home
Learn more about the cookies we use and how to change your settings. Problems with the Required Aluminum Filtration. Qualitative evaluation of flat field images acquired at 71 kV RQA5 beam quality with 21 mm of ultrahigh purity aluminum filtration demonstrated a low frequency mottle that was reproducible and was not observed when ifc measurement was repeated at 74 kV RQA5 beam quality with 21 mm of lower-purity aluminum Search all products by.
As part lec a larger evaluation we attempted to measure the detective quantum efficiency DQE of an amorphous silicon flat-panel detector using the method described in the International Electrotechnical Commission standard published in October Our observations of 6220-1 visible nonuniformities in images acquired with high purity aluminum filtration suggest that the uniformity of filter materials should be carefully evaluated and taken into consideration when measuring the DQE.
Your basket 26220-1 empty. You may experience issues viewing this site in Internet Explorer 9, 10 or Edit my profile Access my dashboard. Accept and continue Learn more about the cookies we use and how to change 622220-1 settings. We recommend that the IEC and committees revisit their recommendation of using aluminum with a minimum purity of Determination of the detective quantum efficiency – Detectors used in mammography.
Click to learn more. Detectors used in radiographic imaging Status: Bestimmung der detektiven Quanten-Ausbeute. 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.
6220-1 finding was ultimately attributed to the larger grain size approximately mm of high purity aluminum metal, which is a well-known 622220-1, particularly in thicknesses greater than 1 mm.
All imaging tests were performed on a prototype amorphous silicon digital detector using the RQA5 beam quality. This part of IEC is not applicable to – digital X-ray imaging devices intended to be used in general radiography or in dental radiography; – computed tomography; and – devices for dynamic imaging where series of images are acquired, as in fluoroscopic or cardiac imaging.
An evaluation isc ultra-high purity aluminum purchased from a second source Qualitative evaluation of flat field images acquired with of ultra-high purity aluminum filtration Detectors used in radiographic imaging. Our observations suggest that the non-uniformity of filter materials should be evaluated when measuring the DQE.