Estimation of the information content of medical images produced by scintillators interacting with diagnostic X-ray beams

dc.contributor.author	Κανδαράκης, Ιωάννης Σ.	el
dc.contributor.author	Κάβουρας, Διονύσης Α.	el
dc.contributor.author	Καλύβας, Νεκτάριος Ι.	el
dc.contributor.author	Νομικός, Κωνσταντίνος Δ.	el
dc.contributor.author	Παναγιωτάκης, Γεώργιος Σ.	el
dc.date.accessioned	2015-01-20T13:23:35Z
dc.date.available	2015-01-20T13:23:35Z
dc.date.issued	2015-01-20
dc.identifier.uri	http://hdl.handle.net/11400/4322
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	Quantum efficiency
dc.subject	X-ray beam
dc.subject	Κβαντική απόδοση
dc.subject	Δέσμη ακτίνων Χ
dc.title	Estimation of the information content of medical images produced by scintillators interacting with diagnostic X-ray beams	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.identifier.secondary	doi:10.1016/S0168-583X(99)00239-6
heal.language	en
heal.access	free
heal.recordProvider	Τ.Ε.Ι. Αθήνας. Σχολή Τεχνολογικών Εφαρμογών. Τμήμα Μηχανικών Βιοϊατρικής Τεχνολογίας Τ.Ε.	el
heal.publicationDate	1999
heal.bibliographicCitation	Kandarakis, I., Cavouras, D., Kalivas, N., Nomicos, C. and Panayiotakis, G. (July 1999). Estimation of the information content of medical images produced by scintillators interacting with diagnostic X-ray beams. Nuclear Instruments and Methods in Physics Research B. 155(1-2). pp. 199–205. Elsevier Science Ltd. Available from: http://www.sciencedirect.com [Accessed 10/08/1999]	en
heal.abstract	The information content of medical images produced by X-ray beam–scintillator interaction was assessed by a method involving detective quantum efficiency (DQE) and information capacity determination. The method was based on emitted light fluence and modulation transfer function (MTF) measurements and it was employed to evaluate the performance of (Gd0.5La0.5)2O2S:Tb scintillator, which was used in the form of laboratory prepared scintillator screens with coating weights ranging between 20 and 139 mg/cm2. Screens were excited to luminescence using 80 and 120 kVp X-ray beams. The scintillator layer exhibited the highest DQE at zero spatial frequency. Thick scintillator layers displayed higher DQE values in the low frequency range while at high frequencies the DQE of thin scintillators were higher. Additionally, thin scintillator layers showed slow DQE variation with increasing frequency. The information capacity of scintillator layers decreased with increasing coating weight indicating that the information content of images produced by thin scintillating layers is higher and more evenly distributed with respect to spatial frequencies.	en
heal.publisher	Elsevier Science Ltd	en
heal.journalName	Nuclear Instruments and Methods in Physics Research B	en
heal.journalType	peer-reviewed
heal.fullTextAvailability	true