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Title: Luminescence efficiency of europium activated Gd2O2S powder phosphors for medical imaging applications
Authors: Μιχαήλ, Χρήστος Μ.
Τουτουντζής, Ανδριανός Ε.
Βαλαής, Ιωάννης Γ.
Σεφέρης, Ιωάννης Ε.
Γεωργούσης, Μιχάλης
Contributors: Φούντος, Γεώργιος Π.
Κανδαράκης, Ιωάννης Σ.
Παναγιωτάκης, Γεώργιος Σ.
Item type: Conference publication
Keywords: Medical imaging;Ιατρική απεικόνιση;Luminescence Efficiency;Matching Factor;Αποδοτικότητα Φωταύγειας;Powder Phosphors;Σκόνη φωσφόρου;Παράγοντας Αντιστοίχισης;Gd2O2S:Eu
Subjects: Medicine
Medical physics
Ιατρική φυσική
Issue Date: 30-Jan-2015
Date of availability: 30-Jan-2015
Publisher: Νερατζής, Ηλίας
Σιανούδης, Ιωάννης
Βαλαής, Ιωάννης Γ.
Φούντος, Γεώργιος Π.
Abstract: The aim of the present study was to examine the performance of the Gd2O2S:Eu powder scintillator for use in medical imaging applications. For this purpose various 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 on silica substrates. Quantum Detection Efficiency (QDE) and Energy Absorption Efficiency (EAE) were evaluated. 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. 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: Special issue: Scientific papers presented on the 3nd International Conference on Experiments/Process/System Modeling/Simulation & Optimization in Athens, 8-11 July, 2009. Mini symposium on Medical Imaging, organized by G. Panayiotakis, I. Kandarakis, G. Fountos and I. Valais
Language: English
Citation: Michail, C.M., Toutountzis, A.E., Valais, I.G., Seferis, I.E., Georgousis, M., et al. (2010). Luminescence efficiency of europium activated Gd2O2S powder phosphors for medical imaging applications. "e-Journal of Science & Technology". [Online] 5(2): 25-32. Available from:
Journal: e-Περιοδικό Επιστήμης & Τεχνολογίας
e-Journal of Science & Technology
Type of Journal: With a review process (peer review)
Access scheme: Publicly accessible
License: Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες
Appears in Collections:Τόμος 05, τεύχος 2 (2010)

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