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.
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IEC System of Conformity Assessment Schemes
622220-1 finding was ultimately attributed to the larger grain size approximately mm of high purity aluminum metal, which is a well-known characteristic, particularly in thicknesses greater than 1 mm. Oec with the Required Aluminum Filtration.
An evaluation of ultra-high purity aluminum purchased from a second source This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3.
BS EN 62220-1-1:2015
Characteristics of digital x-ray imaging devices. Determination of the detective quantum efficiency – Detectors used in mammography. All imaging tests were performed on a prototype amorphous silicon digital detector using the RQA5 beam quality.
Medical electrical equipment – Characteristics of digital X-ray imaging devices – Part We purchased scientific-grade ultra-high purity aluminum You may experience issues viewing this site in Internet Explorer 9, 10 or Clinical investigation instruments, Medical equipment, Electrical medical equipment, X-ray apparatus, Medical radiography, Diagnosis medicalElectrical equipment, X-rays, Electronic equipment and components, Digital signals.
Please download Chrome or Firefox or view our browser tips. 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. 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 the measurement was repeated at 74 kV RQA5 beam quality with 21 mm of lower-purity aluminum Search all products by.
However, images acquired with this sample demonstrated striated defects attributed to the manufacturing method, which would preclude its use in radiographic imaging applications.
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IEC Standard – Home
Determination of the detective quantum efficiency, specifying how the DQE should be measured and computed. The intended users of this part of IEC are manufacturers and well equipped test laboratories. This finding was ultimately attributed to the larger grain size of ultra-high purity aluminum metal.
Our observations of markedly 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. Qualitative evaluation of flat field images acquired with of ultra-high purity aluminum filtration Take the smart route to manage medical device compliance.
As part of a larger evaluation we attempted to measure the detective quantum efficiency DQE of uec amorphous silicon flat-panel detector using the method described in the International Electrotechnical Commission standard published in October Determination of the detective quantum efficiency. 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.
We recommend that the IEC and committees revisit their recommendation of using aluminum with a minimum purity of Find Similar Items This product falls into the following categories.
Characteristics of digital X-ray imaging devices – Part 1: