Comparative evaluation of cerium doped ytrium aluminium oxide powder scintillators (YAG, YAP) for medical imaging applications

dc.contributor.author	Βαλαής, Ιωάννης Γ.	el
dc.contributor.author	Κωνσταντινίδης, Αναστάσιος Χ.	el
dc.contributor.author	Νικολόπουλος, Δημήτριος	el
dc.contributor.author	Σαλεμής, Γεώργιος	el
dc.contributor.author	Δημητρόπουλος, Νικόλαος	el
dc.date.accessioned	2015-01-22T12:28:25Z
dc.date.issued	2015-01-22
dc.identifier.uri	http://hdl.handle.net/11400/4539
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	Inorganic scintillators
dc.subject	Diagnostic imaging
dc.subject	Ανόργανα σπινθηριστές
dc.subject	Ιατρική απεικόνιση
dc.title	Comparative evaluation of cerium doped ytrium aluminium oxide powder scintillators (YAG, YAP) for medical imaging applications	en
heal.type	conferenceItem
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/sh96012193
heal.keywordURI	http://id.loc.gov/authorities/subjects/sh85037507
heal.contributorName	Παναγιωτάκης, Γεώργιος Σ.	el
heal.contributorName	Κανδαράκης, Ιωάννης Σ.	el
heal.dateAvailable	10000-01-01
heal.language	en
heal.access	forever
heal.recordProvider	Τ.Ε.Ι. Αθήνας. Σχολή Τεχνολογικών Εφαρμογών. Τμήμα Μηχανικών Βιοϊατρικής Τεχνολογίας Τ.Ε.	el
heal.publicationDate	2005
heal.bibliographicCitation	Valais, I., Konstantinidis, A., Nikolopoulos, D., Salemis, G., Dimitropoulos, N., et al. (2005). Comparative evaluation of cerium doped ytrium aluminium oxide powder scintillators (YAG, YAP) for medical imaging applications. In the 1st International Conference on Experiments/Process/System Modelling/Simulation/Optimization. Athens, 6th-9th July 2005.	en
heal.abstract	The aim of this study was to evaluate YAlO3: Ce (YAP: Ce) and Y+Al+O+: Ce (YAG: Ce) powder phosphors for use in medical imaging radiation detectors. Both materials are of very short emission decay time being promising for real time medical imaging. YAP: Ce and YAG: Ce powders were used to prepare various screens (19-166 mg/cm2). The absolute luminescence efficiency (emitted light flux over incident x-ray exposure), the intrinsic x-ray to light conversion efficiency and the spectral compatibility with various optical sensors were experimentally determined in a wide range of x-ray energies (22-140 kVp). In addition parameters related to image quality such as the modulation transfer function and the detective quantum efficiency were examined. Theoretical models, describing radiation and light transfer, was employed to fit experimental data and to estimate values of optical parameters. Absolute efficiency was found to decrease with x-ray energy. Highest efficiency was obtained for the 88 mg/cm2 YAP: Ce and for the 107 mg/cm2 YAG: Ce screens. The imaging performance of both materials was found lower to currently employed phosphors. However due to their very fast response and their high spectral compatibility to optical sensors they may be considered for use in real time digital imagers.	en
heal.publisher	[χ.ό.]	el
heal.fullTextAvailability	true
heal.conferenceName	International Conference on Experiments/Process/System Modelling/Simulation/Optimization	en
heal.conferenceItemType	full paper