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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BS EN 62220-1-1:2015
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. Log in Username Password Forgot your password? Determination of the detective quantum efficiency, specifying how the DQE 6220-1 be measured and computed.
Detectors used in radiographic imaging.
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Medical electrical equipment – Characteristics of digital X-ray imaging devices – Part This low frequency mottle significantly overestimates the NPS at low frequencies, which in turn will cause an under-estimation of the low frequency DQE. Please download Chrome or Firefox or view our browser tips.
We recommend that the IEC and committees revisit their recommendation of using aluminum with a minimum purity of 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 Accept and continue Learn more about the cookies we use and how to change your settings.
All imaging tests were performed on a prototype amorphous silicon digital detector using the RQA5 beam quality. This finding was ultimately attributed to the larger grain size of ultra-high purity aluminum metal. Edit my profile Access my dashboard. 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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Search all products by. Characteristics of digital x-ray imaging devices. The faster, easier way to work with standards. You may experience issues viewing this jec 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.
Characteristics of digital X-ray imaging devices – Part 1: 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 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. As part of 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 Learn more about the cookies we use and how to change your settings.
Bestimmung der detektiven Quanten-Ausbeute. Your basket is empty. 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.
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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.
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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.
To achieve the radiographic beam conditions specified in the standard, we purchased scientific-grade ultrahigh purity aluminum Determination of the detective quantum efficiency.
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.
We will discuss problems encountered using ultra-high purity aluminum filtration for DQE evaluations. Determination of the detective quantum efficiency – Detectors used in mammography. The intended users of this part of IEC are manufacturers and well equipped test laboratories. Detectors used in radiographic imaging Status: Click to learn more.
Take the smart route to manage medical device compliance. We purchased scientific-grade ultra-high purity aluminum