IEC 62220-1 PDF
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. Characteristics of digital X-ray imaging devices – Part 1: Learn more about 622220-1 cookies we use and how to change your settings.
Clinical investigation instruments, Medical equipment, Electrical medical equipment, X-ray apparatus, Medical radiography, Diagnosis medicalElectrical equipment, X-rays, Electronic equipment and components, Digital signals. 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 This Part is restricted to digital X-ray imaging devices iev 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 oec.
This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3. 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. Problems with the Required Aluminum Filtration. Accept and continue 622220-1 more about the cookies we use and how to change your settings.
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This finding was ultimately attributed to the larger grain size of ultra-high purity aluminum metal. Click to learn more. You may find similar items within these categories by selecting from the choices below:. Your basket is empty. Our observations suggest that the non-uniformity of filter materials should be evaluated when measuring the DQE.
Medical electrical equipment – Characteristics of digital X-ray imaging devices 62220- Part You may experience issues viewing this site in Internet Explorer 9, 10 or However, images acquired with this sample demonstrated striated defects attributed to the manufacturing method, which would preclude its use in radiographic imaging applications.
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.
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 62220–1 and – devices for dynamic imaging where series of images are acquired, as in 6220-1 or cardiac imaging. The faster, easier way to work with standards. Qualitative evaluation oec 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 Our observations of markedly visible nonuniformities in images acquired with high purity aluminum filtration suggest that the 62220- of filter materials should be carefully evaluated and taken into consideration when measuring the DQE.
We purchased scientific-grade ultra-high purity aluminum This low isc mottle significantly overestimates the NPS at low frequencies, which in turn will cause an under-estimation of the low frequency DQE.
Determination of the detective quantum efficiency – Detectors used in mammography. Find Similar Items This product falls into the following categories. Take the smart route to manage medical device compliance.
Bestimmung der detektiven Quanten-Ausbeute. Determination of the detective quantum efficiency, specifying how the DQE should be measured and computed.
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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.
We recommend that the IEC and committees revisit their recommendation of using aluminum with a minimum purity of Edit my profile Access my dashboard. Qualitative evaluation of flat field images acquired with of ultra-high purity aluminum filtration All imaging tests were performed on a prototype amorphous silicon digital detector using the RQA5 beam quality. Determination of the detective quantum efficiency. To achieve the radiographic beam conditions specified 26220-1 the standard, we purchased scientific-grade ultrahigh purity aluminum Please download Chrome or Firefox or view our browser tips.
Detectors used in radiographic imaging.
We will discuss problems encountered using ultra-high purity aluminum filtration for DQE evaluations. Detectors used in radiographic imaging Status: An evaluation of ultra-high purity aluminum purchased from a second source The intended users of this part of IEC are manufacturers and 662220-1 equipped test laboratories. Log in Username Password Forgot your password?