A comparative investigation of Lu2SiO5:Ce and Gd 2O2S:Eu powder scintillators for use in x-ray mammography detectors

dc.contributor.author	Μιχαήλ, Χρήστος Σ.	el
dc.contributor.author	Φούντος, Γεώργιος Π.	el
dc.contributor.author	Δαυίδ, Στράτος Λ.	el
dc.contributor.author	Βαλαής, Ιωάννης Γ.	el
dc.contributor.author	Τουτουντζής, Ανδριανός Ε.	el
dc.date.accessioned	2015-06-06T21:57:22Z
dc.date.available	2015-06-06T21:57:22Z
dc.date.issued	2015-06-07
dc.identifier.uri	http://hdl.handle.net/11400/15369
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://iopscience.iop.org/1748-0221	en
dc.subject	Image quality
dc.subject	Powder scintillators
dc.subject	Radiation detectors
dc.subject	X-ray mammography
dc.subject	Ποιότητα απεικόνισης
dc.subject	Σκόνη σπινθιστήρων
dc.subject	Ανιχνευτές ακτινοβολίας
dc.subject	Μαστογραφία με ακτίνες Χ
dc.title	A comparative investigation of Lu2SiO5:Ce and Gd 2O2S:Eu powder scintillators for use in x-ray mammography detectors	en
heal.type	journalArticle
heal.classification	Medicine
heal.classification	Chemistry
heal.classification	Ιατρική
heal.classification	Χημεία
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh00006614
heal.classificationURI	http://zbw.eu/stw/descriptor/15638-4
heal.classificationURI	N/A-Ιατρική
heal.classificationURI	N/A-Χημεία
heal.contributorName	Καλύβας, Νεκτάριος Ι.	el
heal.contributorName	Κανδαράκης, Ιωάννης Σ.	el
heal.contributorName	Παναγιωτάκης, Γεώργιος Σ.	el
heal.identifier.secondary	DOI: 10.1088/1748-0221/4/05/P05022
heal.language	en
heal.access	campus
heal.recordProvider	Σχολή Τεχνολογικών Εφαρμογών. Τμήμα Μηχανικών Βιοϊατρικής Τεχνολογίας Τ.Ε.	el
heal.publicationDate	2009
heal.bibliographicCitation	Michail, C., Fountos, G., David, S., Valais, I., Toutountzis, A., et al. (2009) A comparative investigation of Lu2SiO5:Ce and Gd 2O2S:Eu powder scintillators for use in x-ray mammography detectors. "Measurement Science and Technology", 20 (10). Available from: http://iopscience.iop.org/0957-0233/20/10/104008/ [Accessed: 06/06/2015].	en
heal.abstract	The dominant powder scintillator in most medical imaging modalities for decades has been Gd2O2S:Tb due to the very good intrinsic properties and overall efficiency. Apart from Gd2O2S:Tb, there are alternative powder phosphor scintillators such as Lu 2SiO5:Ce and Gd2O2S:Eu that have been suggested for use in various medical imaging modalities. Gd 2O2S:Eu emits red light and can be combined mainly with digital mammography detectors such as CCDs. Lu2SiO5:Ce emits blue light and can be combined with blue sensitivity films, photocathodes and some photodiodes. For the purposes of the present study, two scintillating screens, one from Lu2SiO5:Ce and the other from Gd 2O2S:Eu powders, were prepared using the method of sedimentation. The screen coating thicknesses were 25.0 and 33.1 mg cm -2 respectively. The screens were investigated by evaluating the following parameters: the output signal, the modulation transfer function, the noise equivalent passband, the informational efficiency, the quantum detection efficiency and the zero-frequency detective quantum efficiency. Furthermore, the spectral compatibility of those materials with various optical detectors was determined. Results were compared to published data for the commercially employed 'Kodak Min-R film-screen system', based on a 31.7 mg cm-2 thick Gd2O2S:Tb phosphor. For Gd2O 2S:Eu, MTF data were found comparable to those of Gd 2O2S:Tb, while the MTF of Lu2SiO5:Ce was even higher resulting in better spatial resolution and image sharpness properties. On the other hand, Gd2O2S:Eu was found to exhibit higher output signal and zero-frequency detective quantum efficiency than Lu2SiO5:Ce.	en
heal.publisher	Birch, David	en
heal.journalName	Measurement Science and Technology	en
heal.journalType	peer-reviewed
heal.fullTextAvailability	true