Evaluation of imaging performance of a taper optics CCD; FReLoN' camera designed for medical imaging

Journal of Synchrotron Radiation
P CoanA Bravin

Abstract

The purpose of this work was to assess the imaging performance of an indirect conversion detector (taper optics CCD; FReLoN' camera) in terms of the modulation transfer function (MTF), normalized noise power spectrum (NNPS) and detective quantum efficiency (DQE). Measurements were made with a synchrotron radiation laminar beam at various monochromatic energies in the 20-51.5 keV range for a gadolinium-based fluorescent screen varying in thickness; data acquisition and analysis were made by adapting to this beam geometry protocols used for conventional cone beams. The pre-sampled MTFs of the systems were measured using an edge method. The NNPS of the systems were determined for a range of exposure levels by two-dimensional Fourier analysis of uniformly exposed radiographs. The DQEs were assessed from the measured MTF, NNPS, exposure and incoming number of photons. The MTF, for a given screen, was found to be almost energy independent and, for a given energy, higher for the thinnest screen. At 33 keV and for the 40 (100) microm screen, at 10% the MTF is 9.2 (8.6) line-pairs mm(-1). The NNPS was found to be different in the two analyzed directions in relation to frequency. Highest DQE values were found for the combination 100 micr...Continue Reading

Citations

Oct 24, 2012·Proceedings of the National Academy of Sciences of the United States of America·Yunzhe ZhaoAlberto Bravin
Apr 20, 2010·Journal of Synchrotron Radiation·Raphaël SerducChristian Nemoz
Feb 22, 2011·Journal of Synchrotron Radiation·Lucas J KoernerSol M Gruner
Mar 29, 2013·PloS One·Arne TapferFranz Pfeiffer
Sep 18, 2008·Radiology·Jani KeyriläinenAlberto Bravin
Mar 2, 2012·Optics Letters·Alessandro OlivoAlberto Bravin
Jul 3, 2015·Journal of Synchrotron Radiation·Paul C DiemozAlessandro Olivo
Mar 1, 2011·Acta Biomaterialia·Rui Ping HooMark Hoffman
Dec 25, 2015·Journal of Synchrotron Radiation·Christian NemozRaphaël Serduc
Oct 3, 2008·European Journal of Radiology·M RenierA Bravin
Jul 1, 2008·European Journal of Radiology·Paola CoanAlberto Bravin
Oct 19, 2011·Neurological Research·Pantaleo Romanelli, Alberto Bravin
Jun 3, 2015·Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)·Pantaleo RomanelliAlberto Bravin
Apr 13, 2015·Computers in Biology and Medicine·K BliznakovaI Buliev
May 7, 2015·Acta Crystallographica. Section D, Biological Crystallography·Nicolas CoquelleJacques Philippe Colletier
Jan 21, 2015·Nature Communications·Vito MocellaDaniel Delattre
Sep 1, 2016·Journal of Synchrotron Radiation·Pauline FournierMichael Lerch
Feb 1, 2007·Physics in Medicine and Biology·Michael E KellyKotoo Meguro
Nov 30, 2010·Physics in Medicine and Biology·Paola CoanJuergen Mollenhauer
Apr 10, 2015·Physics in Medicine and Biology·A MittoneP Coan
Sep 3, 2020·Journal of Synchrotron Radiation·Alberto MittoneAlberto Bravin
Nov 2, 2017·Journal of Synchrotron Radiation·Alberto MittoneAlberto Bravin
Jan 11, 2018·Scientific Reports·Erminia FardonePantaleo Romanelli
May 27, 2008·Analytical Chemistry·Kouichi TsujiChul-Un Ro

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