Investigation of radiation absorption and X-ray fluorescence properties of medical imaging scintillators by Monte Carlo methods

dc.contributor.author	Νικολόπουλος, Δημήτριος	el
dc.contributor.author	Κανδαράκης, Ιωάννης Σ.	el
dc.contributor.author	Κάβουρας, Διονύσης Α.	el
dc.contributor.author	Βαλαής, Ιωάννης Γ.	el
dc.contributor.author	Λιναρδάτος, Διονύσης	el
dc.date.accessioned	2015-01-22T18:00:26Z
dc.date.available	2015-01-22T18:00:26Z
dc.date.issued	2015-01-22
dc.identifier.uri	http://hdl.handle.net/11400/4561
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://www.elsevier.com	en
dc.subject	Scintillators
dc.subject	X-ray imaging
dc.subject	Σπινθηριστές
dc.subject	Απεικόνιση με ακτίνες Χ
dc.title	Investigation of radiation absorption and X-ray fluorescence properties of medical imaging scintillators by Monte Carlo methods	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/sh85118713
heal.contributorName	Μιχαήλ, Χρήστος Μ.	el
heal.contributorName	Δαυίδ, Στράτος Λ.	el
heal.contributorName	Γαϊτάνης, Αναστάσιος	el
heal.contributorName	Νομικός, Κωνσταντίνος Δ.	el
heal.contributorName	Λουίτζη, Άννα	el
heal.identifier.secondary	doi:10.1016/j.nima.2006.05.170
heal.language	en
heal.access	free
heal.recordProvider	Τ.Ε.Ι. Αθήνας. Σχολή Τεχνολογικών Εφαρμογών. Τμήμα Μηχανικών Βιοϊατρικής Τεχνολογίας Τ.Ε.	el
heal.publicationDate	2006
heal.bibliographicCitation	Nikolopoulos, D., Kandarakis, I., Cavouras, D., Valais, I., Linardatos, D., et al. (September 2006). Investigation of radiation absorption and X-ray fluorescence properties of medical imaging scintillators by Monte Carlo methods. Nuclear Instruments and Methods in Physics Research A. 565(2). pp. 821–832. Elsevier Science Ltd. Available from: http://www.sciencedirect.com [Accessed 30/06/2006]	en
heal.abstract	X-ray absorption and X-ray fluorescence properties of medical imaging scintillating screens were studied by Monte Carlo methods as a function of the incident photon energy and screen-coating thickness. The scintillating materials examined were Gd2O2S, (GOS) Gd2SiO5 (GSO) YAlO3 (YAP), Y3Al5O12 (YAG), LuSiO5 (LSO), LuAlO3 (LuAP) and ZnS. Monoenergetic photon exposures were modeled in the range from 10 to 100 keV. The corresponding ranges of coating thicknesses of the investigated scintillating screens ranged up to 200 mg cm−2. Results indicated that X-ray absorption and X-ray fluorescence are affected by the incident photon energy and the screen's coating thickness. Regarding incident photon energy, this X-ray absorption and fluorescence was found to exhibit very intense changes near the corresponding K edge of the heaviest element in the screen's scintillating material. Regarding coating thickness, thicker screens exhibited higher X-ray absorption and X-ray fluorescence. Results also indicated that a significant fraction of the generated X-ray fluorescent quanta escape from the scintillating screen. This fraction was found to increase with screen's coating thickness. At the energy range studied, most of the incident photons were found to be absorbed via one-hit photoelectric effect. As a result, the reabsorption of scattered radiation was found to be of rather minor importance; nevertheless this was found to increase with the screen's coating thickness. Differences in X-ray absorption and X-ray fluorescence were found among the various scintillators studied. LSO scintillator was found to be the most attractive material for use in many X-ray imaging applications, exhibiting the best absorption properties in the largest part of the energy range studied. Y-based scintillators were also found to be of significant absorption performance within the low energy ranges.	en
heal.publisher	Elsevier Science Ltd	en
heal.journalName	Nuclear Instruments and Methods in Physics Research A	en
heal.journalType	peer-reviewed
heal.fullTextAvailability	true