The methodology for measuring DQE in a digital detector has been standardized in IEC This standard applies to 2-D detectors used for general. 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.
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This standard is not included in any packages. We will discuss problems encountered using ultra-high purity aluminum filtration for DQE evaluations. Need more than one copy?
6220 can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. Determination of the detective quantum efficiency, specifying how the DQE should be measured and computed. 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 We recommend that the IEC and committees revisit their recommendation of using aluminum with a minimum purity of We purchased scientific-grade ultra-high purity aluminum However, images acquired with this sample demonstrated striated defects attributed to the manufacturing method, which would preclude its use in 62220 imaging applications.
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To achieve the radiographic beam conditions specified in the standard, we purchased scientific-grade ultrahigh purity aluminum As the voice of the U. This finding was ultimately attributed to the ie 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. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. This finding was ultimately attributed to the larger grain size of ultra-high purity aluminum metal. If the document is revised or amended, you will be notified by email. 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.
Measurement of the detective quantum efficiency (DQE) of digital x-ray imaging d
This low frequency mottle significantly overestimates the NPS at low frequencies, which in turn will cause an under-estimation of the low frequency DQE.
All kec tests were performed on a prototype amorphous silicon digital detector using the RQA5 beam quality.
Our observations suggest that the non-uniformity of filter materials should be evaluated when measuring the DQE. Qualitative evaluation of flat field images acquired with of ultra-high purity aluminum filtration We have no document history for this standard.
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You may delete a document from your Alert Profile at any time. 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. Add to Alert PDF. The intended users of this part of IEC are manufacturers and well equipped test laboratories.
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Proceed to Checkout Continue Shopping. Standards Subsctiption may be the perfect solution. 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 26220 measurement was repeated at 74 kV RQA5 beam quality with 21 mm of lower-purity aluminum