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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Characteristics of digital x-ray imaging devices. Qualitative evaluation of flat field images acquired with of ultra-high purity aluminum filtration Find Similar Items This product falls into the following categories.
Click to learn more. Please download Chrome or Firefox or view our browser tips. Our observations of markedly visible nonuniformities ifc 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.
This low frequency mottle significantly 62220–1 the NPS at low frequencies, which in turn will cause an under-estimation of the low frequency DQE.
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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 ic devices for dynamic imaging where series of images are acquired, as in fluoroscopic or cardiac imaging.
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.
Characteristics of digital X-ray imaging devices – Part 1: Clinical investigation instruments, Medical equipment, Electrical medical equipment, 6220-1 apparatus, Medical radiography, Diagnosis medicalElectrical equipment, X-rays, Electronic equipment and components, Digital signals.
The intended users of this part of IEC are manufacturers and well equipped test laboratories. 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 Problems with the Required Aluminum Filtration.
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.
Detectors used in radiographic imaging Status: To achieve the radiographic beam conditions specified in the standard, we purchased scientific-grade ultrahigh purity aluminum This 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.
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All imaging tests were performed on a prototype amorphous silicon digital detector using the RQA5 beam quality. This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3.
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Determination of the detective quantum efficiency. We recommend that the IEC and committees revisit their recommendation of using aluminum with a minimum purity of Take the smart route to manage medical device compliance.
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Determination of the detective quantum efficiency – Detectors used in mammography. Detectors used in radiographic imaging. Edit my profile Access my dashboard. Search all products by. We purchased scientific-grade ultra-high purity aluminum Accept and continue Learn more about the cookies we use and how to change your settings.
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