PMID: 15377085Sep 21, 2004Paper

Determination of the detective quantum efficiency of a digital x-ray detector: comparison of three evaluations using a common image data set

Medical Physics
U NeitzelEhsan Samei

Abstract

The detective quantum efficiency (DQE) of an x-ray digital imaging detector was determined independently by the three participants of this study, using the same data set consisting of edge and flat field images. The aim was to assess the possible variation in DQE originating from established, but slightly different, data processing methods used by different groups. For the case evaluated in this study differences in DQE of up to +/-15% compared to the mean were found. The differences could be traced back mainly to differences in the modulation transfer function (MTF) and noise power spectrum (NPS) determination. Of special importance is the inclusion of a possible low-frequency drop in MTF and the proper handling of signal offsets for the determination of the NPS. When accounting for these factors the deviation between the evaluations reduced to approximately +/-5%. It is expected that the recently published standard on DQE determination will further reduce variations in the data evaluation and thus in the results of DQE measurements.

References

May 7, 2002·Medical Physics·Ehsan Samei, Michael J Flynn
Aug 9, 2003·Medical Physics·Giovanni BorasiDavide Tassoni

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Citations

Jul 31, 2012·Journal of Radiation Research·Rie TanakaSigeru Sanada
Feb 12, 2010·Radiation Protection Dosimetry·Magnus Båth
Feb 11, 2012·Medical Physics·Nicholas W MarshallHilde Bosmans
Feb 4, 2010·Nihon Hoshasen Gijutsu Gakkai zasshi·Haruyuki WatanabeKatsuyuki Kojima
Aug 13, 2010·Nihon Hoshasen Gijutsu Gakkai zasshi·Hiroshi KunitomoMichito Sawada
May 16, 2006·Medical Physics·Sarah J Boyce, Ehsan Samei
Mar 17, 2010·Medical Physics·Andrew Kuhls-GilcristStephen Rudin
Jul 29, 2006·Medical Physics·Giovanni BorasiDavide Tassoni
Nov 4, 2008·Medical Physics·S N Friedman, I A Cunningham
Nov 30, 2014·Radiation Protection Dosimetry·T D PerksT S Douglas
Jun 20, 2015·Radiological Physics and Technology·Ryo HigashideKazuya Ohashi
Jun 5, 2014·BioMed Research International·Christos M MichailIoannis S Kandarakis
Oct 4, 2016·Radiological Physics and Technology·Lutfi Ergun, Turan Olgar
Nov 4, 2008·Medical Physics·Iacovos S KyprianouKyle J Myers
Jul 15, 2005·Medical Physics·Ann-Katherine CartonGuy Marchal
Nov 30, 2016·Journal of Digital Imaging·Agnes M F FaustoFermin G Velasco
Jul 25, 2014·Nihon Hoshasen Gijutsu Gakkai zasshi·Hiroshi KunitomoMichito Sawada
Mar 7, 2021·Materials·Dionysios LinardatosChristos Michail

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