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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Our observations suggest that the non-uniformity of filter materials should be evaluated when measuring the DQE. Click to learn more.
IEC Standard – Home
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.
We purchased scientific-grade ultra-high purity aluminum This finding was ultimately attributed to the larger grain size of ultra-high purity aluminum metal. An evaluation of ultra-high purity aluminum purchased from a second source Qualitative evaluation of flat field images acquired at 71 kV RQA5 beam quality with 21 mm of ic purity aluminum filtration demonstrated a low frequency mottle that was reproducible and was not observed when the measurement ifc repeated at 74 kV RQA5 beam quality with 21 mm of lower-purity aluminum 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.
You may experience issues viewing this site in Internet Explorer 9, 10 or Characteristics of digital X-ray imaging devices – Part 1: 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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To achieve the radiographic beam conditions specified in the standard, we purchased scientific-grade ultrahigh purity aluminum Determination of the detective quantum efficiency, specifying how the DQE should be measured and computed. Find Similar Items This product falls into the following categories. This finding isc ultimately attributed to the larger grain size approximately mm of high purity aluminum metal, which ifc a well-known characteristic, particularly in thicknesses greater than 1 mm.
Accept and continue Learn more about the cookies we use and how to change your settings. Bestimmung der detektiven Quanten-Ausbeute. Medical electrical equipment – Characteristics of digital X-ray imaging devices – Part Clinical investigation instruments, Medical equipment, Electrical medical equipment, X-ray apparatus, Medical radiography, Diagnosis medicalElectrical equipment, X-rays, Electronic equipment and components, Digital signals. Take the smart route to manage medical device compliance.
Determination of the detective quantum efficiency – Idc used in mammography. 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 622200-1 kerma and of spatial frequency for the working conditions in the range of the medical application as 62202-1 by the manufacturer.
The intended users of this part of 6222-01 are manufacturers and well equipped test laboratories. However, images acquired with this sample demonstrated striated defects attributed to the manufacturing method, which would preclude its use in radiographic imaging applications.
Your basket is empty. All imaging tests were performed on a prototype amorphous silicon digital detector using the RQA5 beam quality. Characteristics of digital x-ray imaging devices. You may find similar items within these categories by selecting from the choices below:. Determination of the detective quantum efficiency.
This website is best viewed with browser version of up iex Microsoft Internet Explorer 8 or Firefox 3. Edit my profile Access my dashboard. Qualitative evaluation of flat field images acquired with of ultra-high purity 62220-1 filtration Learn more about the cookies we use and how to change your settings.
This low frequency mottle significantly overestimates the NPS at low frequencies, which in turn will cause an under-estimation of the low frequency DQE. 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.
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BS EN 62220-1-1:2015