Please use this identifier to cite or link to this item: http://hdl.handle.net/11400/8535
Title: An experimental method to determine the effective luminescence efficiency of scintillator-photodetector combinations used in X-ray medical imaging systems
Authors: Κάβουρας, Διονύσης Α.
Κανδαράκης, Ιωάννης Σ.
Μπάκας, Αθανάσιος
Τριάντης, Δήμος Α.
Νομικός, Κωνσταντίνος Δ.
Contributors: Παναγιωτάκης, Γεώργιος Σ.
Item type: Journal article
Keywords: Geometrical configuration;Test screens;Image brightness level;Orthochromatic radiographic films;Fluoroscopy;Γεωμετρική διαμόρφωση;Δοκιμή οθονών;Επίπεδο φωτεινότητας της εικόνας;Ορθοχρωματικό ακτινογραφικό φιλμ;Ακτινοσκόπηση
Subjects: Medicine
Medical physics
Ιατρική
Ιατρική φυσική
Issue Date: 19-Apr-2015
1998
Publisher: British Institute of Radiology
Abstract: The scintillator effective luminescence efficiency, which may be defined in terms of the scintillator's X-ray luminescence efficiency and the scintillator-photodetector spectral matching and geometrical configuration, was studied for various X-ray imaging applications. Four scintillator materials Gd2O2S:Tb, Y2O2S:Tb, ZnSCdS:Ag and CsI:Na were used to prepare test screens. They were evaluated in relation to various photodetectors used in X-ray imaging, such as radiographic films, photocathodes, and photodiodes. Effective luminescence efficiency was determined for a range of X-ray tube voltages (50-140 kVp) by measuring the light flux emitted per unit of incident exposure rate and the spectra of the light emitted by the four scintillators. Scintillator-photodetector combinations resulting in higher image brightness level were determined for different X-ray imaging systems. Findings indicate that CsI:Na is very efficient with orthochromatic radiographic films, Gd2O2S:Tb could be useful in conventional or digital fluoroscopy and in CT and ZnSCdS:Ag could be employed in some medium to low voltage digital radiography applications.
Language: English
Citation: CAVOURAS, D.A., KANDARAKIS, I.S., BAKAS, A., TRIANTIS, D.A., NOMICOS, C.D., ET AL. (1998). An experimental method to determine the effective luminescence efficiency of scintillator-photodetector combinations used in X-ray medical imaging systems. British Journal of Radiology. [Online] 71 (847). p.766-772. Available from: http://www.birpublications.org/[Accessed 28/01/2014]
Journal: British Journal of Radiology
Type of Journal: With a review process (peer review)
Access scheme: Embargo
License: Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες
URI: http://hdl.handle.net/11400/8535
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