Light emission efficiency and imaging performance of Gd2O2S:Eu powder
scintillator under x-ray radiography conditions

dc.contributor.author	Μιχαήλ, Χρήστος Μ.	el
dc.contributor.author	Φούντος, Γεώργιος Π.	el
dc.contributor.author	Λιαπαρίνος, Παναγιώτης Φ.	el
dc.contributor.author	Καλύβας, Νεκτάριος Ι.	el
dc.contributor.author	Βαλαής, Ιωάννης Γ.	el
dc.date.accessioned	2015-01-19T11:19:39Z
dc.date.available	2015-01-19T11:19:39Z
dc.date.issued	2015-01-19
dc.identifier.uri	http://hdl.handle.net/11400/4247
dc.rights	Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/us/	*
dc.source	http://scitation.aip.org/	en
dc.subject	X-ray detectors
dc.subject	X-ray optics
dc.subject	Ανιχνευτές ακτίνων-Χ
dc.subject	Οπτικά ακτίνων Χ
dc.title	Light emission efficiency and imaging performance of Gd2O2S:Eu powder scintillator under x-ray radiography conditions	en
heal.type	journalArticle
heal.classification	Medicine
heal.classification	Physics
heal.classification	Ιατρική
heal.classification	Φυσική
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh00006614
heal.classificationURI	http://skos.um.es/unescothes/C02994
heal.classificationURI	N/A-Ιατρική
heal.classificationURI	N/A-Φυσική
heal.keywordURI	http://id.loc.gov/authorities/subjects/sh85148740
heal.contributorName	Κανδαράκης, Ιωάννης Σ.	el
heal.contributorName	Παναγιωτάκης, Γεώργιος Σ.	el
heal.identifier.secondary	DOI: 10.1118/1.3451113
heal.language	en
heal.access	free
heal.recordProvider	Τ.Ε.Ι. Αθήνας. Σχολή Τεχνολογικών Εφαρμογών. Τμήμα Μηχανικών Βιοϊατρικής Τεχνολογίας Τ.Ε.	el
heal.publicationDate	2010
heal.bibliographicCitation	Michail, C., Fountos, G., Liaparinos, P., Kalyvas, N., Valais, I., et al. (July 2010). Light emission efficiency and imaging performance of Gd2O2S:Eu powder scintillator under x-ray radiography conditions. Medical Physics. 37(7). pp. 3694-3703. American Association of Physicists in Medicine. Available from: http://scitation.aip.org	en
heal.abstract	Purpose: To evaluate Gd2O2S:Eu powder phosphor as a radiographic image receptor and to compare it to phosphors often used in radiography. Gd2O2S:Eu is nonhygroscopic, emitting red light with decay time close to that of Gd2O2S:Tb. Methods: The light intensity emitted per unit of x-ray exposure rate absolute luminescence efficiency was measured for laboratory prepared screens with coating thicknesses of 33.1, 46.4, 63.1, 78.3, and 139.8 mg/cm2 and tube voltages ranging from 50 to 140 kVp. Parameters related to image quality such as the modulation transfer function MTF and the detective quantum efficiency DQE were also experimentally examined. In addition, a previously validated Monte Carlo code was used to estimate intrinsic x-ray absorption and optical properties, as well as the MTF and the Swank factor I of the Gd2O2S:Eu scintillators. Results: Gd2O2S:Eu light intensity was found higher than that of single CsI:Tl crystal for tube voltages up to 100 kVp. The MTF and the DQE were found to be comparable with those of Gd2O2S:Tb and CsI:Tl screens. MTF estimated by the Monte Carlo code was found very close to the experimental MTF values. Gd2O2S:Eu showed peak emission in the wavelength range 620–630 nm. Its emission spectrum was excellently matched to various optical detectors photodiodes, photocathodes, CCDs, and CMOS employed in flat panel detectors. Conclusions: Gd2O2S:Eu is an efficient phosphor potentially well suited to radiography and especially to some digital detectors sensitive to red light.	en
heal.publisher	American Association of Physicists in Medicine	en
heal.journalName	Medical Physics	en
heal.journalType	peer-reviewed
heal.fullTextAvailability	true