Comparative Investigation of Ce3+ Doped Scintillators in a Wide Range of Photon
Energies Covering X-ray CT, Nuclear Medicine and Megavoltage Radiation Therapy Portal Imaging
Applications

dc.contributor.author	Βαλαής, Ιωάννης Γ.	el
dc.contributor.author	Μιχαήλ, Χρήστος Μ.	el
dc.contributor.author	Δαυίδ, Στράτος Λ.	el
dc.contributor.author	Λιαπαρίνος, Παναγιώτης Φ.	el
dc.contributor.author	Φούντος, Γεώργιος Κ.	el
dc.date.accessioned	2015-01-23T14:46:05Z
dc.date.available	2015-01-23T14:46:05Z
dc.date.issued	2015-01-23
dc.identifier.uri	http://hdl.handle.net/11400/4612
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	X-ray monochromators
dc.subject	Bioluminescence
dc.subject	Μονοχρωματόρες ακτίνων Χ
dc.subject	Βιοφωτισμός
dc.title	Comparative Investigation of Ce3+ Doped Scintillators in a Wide Range of Photon Energies Covering X-ray CT, Nuclear Medicine and Megavoltage Radiation Therapy Portal Imaging Applications	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-Φυσική
heal.classificationURI	N/A-Πυρηνική φυσική
heal.keywordURI	http://id.loc.gov/authorities/subjects/sh85014228
heal.contributorName	Πασχάλης, Θεόδωρος Β.	el
heal.contributorName	Κανδαράκης, Ιωάννης Σ.	el
heal.contributorName	Παναγιωτάκης, Γεώργιος Σ.	el
heal.identifier.secondary	DOI: 10.1109/TNS.2009.2038273
heal.language	en
heal.access	campus
heal.recordProvider	Τ.Ε.Ι. Αθήνας. Σχολή Τεχνολογικών Εφαρμογών. Τμήμα Μηχανικών Βιοϊατρικής Τεχνολογίας Τ.Ε.	el
heal.publicationDate	2010
heal.bibliographicCitation	Valais, I., Michail, C., David, S., Liaparinos, P., Fountos, G., et al. (February 2010). Comparative investigation of Ce3+ doped scintillators in a wide range of photon energies covering X-ray CT, nuclear medicine and megavoltage radiation therapy portal imaging applications. Transactions on Nuclear Science. 57(1). pp. 3-7. IEEE.	en
heal.abstract	The aim of the present work is to study the performance of scintillators currently used in PET and animal PET systems, under conditions met in radiation therapy and PET/CT imaging. The results of this study will be useful in applications where both CT and PET photons as well as megavoltage cone beam CT (MV CBCT) photons could be detected using a common detector unit. To this aim crystal samples of GSO, LSO, LYSO, LuYAP and YAP scintillators, doped with cerium (Ce+3) were examined under a wide energy range of photon energies. Evaluation was performed by determining the absolute luminescence efficiency (emitted light flux over incident X-ray exposure) in the energy range employed in X-ray CT, in Nuclear Medicine (70 keV up to 662 keV) and in radiotherapy 6 MV (approx. 2.0 MeV mean energy)-18 MV (approx. 4.5 MeV mean energy). Measurements were performed using an experimental set-up based on a photomultiplier coupled to a light integration sphere. The emission spectrum under X-ray excitation was measured, using an optical grating monochromator, to determine the spectral compatibility to optical photon detectors incorporated in medical imaging systems. Maximum absolute luminescence efficiency values were observed at 70 keV for YAP:Ce and LuYAP:Ce and at 140 keV for LSO:Ce, LYSO:Ce and GSO:Ce. Highest absolute efficiency between the scintillators examined was observed for LSO:Ce, followed by LYSO:Ce. The detector optical gain (DOG) exhibited a significant variation with the increase of energy between 70 keV to 2.0 MeV. All scintillators exhibited low compatibility when combined with GaAsP (G5645) photodetector.	en
heal.sponsor	IEEE Nuclear and Plasma Sciences Society	en
heal.publisher	IEEE	en
heal.journalName	Transactions on Nuclear Science	en
heal.journalType	peer-reviewed
heal.fullTextAvailability	true