Light emission efficiency of Lu2O3:eu nanophosphor scintillating screen under x-ray radiographic conditions.

dc.contributor.author	Σεφέρης, Ιωάννης Ε.	el
dc.contributor.author	Καλύβας, Νεκτάριος Ι.	el
dc.contributor.author	Βαλαής, Ιωάννης Γ.	el
dc.contributor.author	Μιχαήλ, Χρήστος Μ.	el
dc.contributor.author	Λιαπαρίνος, Παναγιώτης Φ.	el
dc.date.accessioned	2015-01-21T13:34:32Z
dc.date.issued	2015-01-21
dc.identifier.uri	http://hdl.handle.net/11400/4442
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.subject	Radiography, Medical--Digital techniques--Congresses
dc.subject	Absolute efficiency
dc.subject	Ακτινογραφία
dc.subject	Απόλυτη απόδοση
dc.title	Light emission efficiency of Lu2O3:eu nanophosphor scintillating screen under x-ray radiographic conditions.	en
heal.type	conferenceItem
heal.generalDescription	Proc. of SPIE Vol. 8668	en
heal.classification	Medicine
heal.classification	Medical technology
heal.classification	Ιατρική
heal.classification	Ιατρική τεχνολογία
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh00006614
heal.classificationURI	http://skos.um.es/unescothes/C02465
heal.classificationURI	N/A-Ιατρική
heal.classificationURI	N/A-Ιατρική τεχνολογία
heal.keywordURI	http://id.loc.gov/authorities/subjects/sh2010109376
heal.contributorName	Φούντος, Γεώργιος Π.	el
heal.contributorName	Zych, E.	en
heal.contributorName	Κανδαράκης, Ιωάννης Σ.	el
heal.contributorName	Παναγιωτάκης, Γεώργιος Σ.	el
heal.identifier.secondary	doi:10.1117/12.2015265
heal.dateAvailable	10000-01-01
heal.language	el
heal.access	forever
heal.recordProvider	Τ.Ε.Ι. Αθήνας. Σχολή Τεχνολογικών Εφαρμογών. Τμήμα Μηχανικών Βιοϊατρικής Τεχνολογίας Τ.Ε.	el
heal.publicationDate	2013
heal.bibliographicCitation	Seferis, I., Kalyvas, N., Valais, I., Michail, C., Liaparinos, P., et al. (2013). Light emission efficiency of Lu2O3:Eu nanophosphor scintillating screen under x-ray radiographic conditions. In the SPIE 8668, Medical Imaging 2013: Physics of Medical Imaging. Lake Buena Vista (Orlando Area), 2013. pp. 1-8.	en
heal.abstract	Powder phosphors scintillators are used in indirect digital radiography as x-ray to light converters coupled to electronic optical sensors (photodiodes, CCDs, CMOS). Recently, nanophosphors have been reported to have enhanced luminescence efficiency. The purpose of the present study was to evaluate Lu2O3:Eu nanophosphor as a candidate for digital medical imaging applications. Lu2O3:Eu was employed in the form of a 30.2 mg/cm2 powder screen with 50 nm grain size and 5% Eu concentration. Both the nanophosphor material and the screen were prepared in our laboratories. Parameters such as the Absolute Efficiency-AE (light energy flux over exposure rate), the Luminescence Efficiency- XLE (Light energy flux over incident x-ray energy flux), Detector Quantum Gain-DQG (optical quanta emitted per incident x-ray quantum) and the light spectral compatibility to electronic optical sensors (Effective Efficiency) were investigated under x-ray excitation in the radiographic energy range. Results were compared with previously published data for a 33.1 mg/cm2 Gd2O2S:Eu conventional phosphor screen. It was found that Lu2O3:Eu nanophosphor has higher AE and XLE by a factor of 1.32 and 1.37 on average, respectively, in the whole radiographic energy range. DQG was also found higher in the energy range from 50 kVp to 100 kVp and comparable thereafter. Effective efficiency was found with high values for electronic optical sensors such as CCDs and CMOS, due to the high spectral compatibility with the upper visible wavelength range. These results indicate that Lu2O3:Eu nanophosphor could potentially be considered for applications in digital x-ray radiography detectors.	en
heal.publisher	[χ.ό.]	el
heal.fullTextAvailability	true
heal.conferenceName	Medical Imaging 2013: Physics of Medical Imaging	en
heal.conferenceItemType	full paper