Please use this identifier to cite or link to this item: http://hdl.handle.net/11400/4529
Title: Efficiency of Gd2O2S: eu powder phosphor as X-ray to light converter under radiographic imaging conditions
Authors: Μιχαήλ, Χρήστος Μ.
Βαλαής, Ιωάννης Γ.
Τουτουντζής, Ανδριανός Ε.
Σεφέρης, Ιωάννης Ε.
Γεωργούσης, Μιχάλης
Contributors: Φούντος, Γεώργιος Π.
Σαμαρτζής, Αναστάσιος
Λιαπαρίνος, Παναγιώτης Φ.
Κανδαράκης, Ιωάννης Σ.
Παναγιωτάκης, Γεώργιος Σ.
Item type: Book chapter
Keywords: Luminescence efficiency;Powder phosphors;Αποδοτικότητα φωταύγειας;Φωσφορίζουσα σκόνη
Subjects: Medicine
Physics
Ιατρική
Φυσική
Issue Date: 22-Jan-2015
2009
Date of availability: 22-Jan-2015
Publisher: Springer Berlin Heidelberg
Abstract: The aim of the present study was to examine the Gd2O2S:Eu powder scintillator under general X-ray Radiographic imaging conditions. For this purpose five scintillator screens with coating thicknesses 33.1, 46.4, 63.1, 78.3 and 139.8 mg/cm2 were prepared in our laboratory by sedimentation of Gd2O2S:Eu powder. Light emission efficiency and optical emission spectra of the screens were measured under X-ray excitation using X-ray tube voltages (50-140 kVp) employed in X-ray radiography. Spectral compatibility with various optical photon detectors (photodiodes, photocathodes, charge coupled devices, films) were determined using emission spectrum data. In addition, parameters related to X-ray detection and energy absorption efficiency were calculated. Gd2O2S:Eu showed peak emission in the wavelength range 620-630 nm. The 139.8 mg/cm2 phosphor screen appeared with the maximum light emission efficiency. Due to its reddish emission spectrum, Gd2O2S:Eu showed excellent compatibility with the sensitivity of many currently used photodetectors and could be considered for application in X-ray imaging especially in various digital detectors.
Description: IFMBE Proceedings
Language: English
Citation: Michail, C., Valais, I., Toutountzis, A., Seferis, I., Georgousis, M., et al. (2009). Efficiency of Gd2O2S: eu powder phosphor as X-ray to light converter under radiographic imaging conditions. World Congress on Medical Physics and Biomedical Engineering, September 7 - 12, 2009, Munich, Germany. 25(2). pp. 794-797. Springer Berlin Heidelberg. Available from: http://link.springer.com
Book: World Congress on Medical Physics and Biomedical Engineering, September 7 - 12, 2009, Munich, Germany
Access scheme: Publicly accessible
License: Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες
URI: http://hdl.handle.net/11400/4529
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