Please use this identifier to cite or link to this item: http://hdl.handle.net/11400/4254
Title: A comparative investigation of Lu2SiO5:Ce and Gd2O2S:eu powder scintillators for use in x-ray mammography detectors
Authors: Μιχαήλ, Χρήστος Μ.
Φούντος, Γεώργιος Π.
Ντάβιντ, Στράτος Λ.
Βαλαής, Ιωάννης Γ.
Τουτουντζής, Ανδριανός Ε.
Contributors: Καλύβας, Νεκτάριος Ι.
Κανδαράκης, Ιωάννης Σ.
Παναγιωτάκης, Γεώργιος Σ.
Item type: Journal article
Keywords: X-ray mammography;Nuclear counters;Μαστογραφία με ακτίνες Χ;Ανιχνευτές ακτινοβολίας
Subjects: Medicine
Physics
Ιατρική
Φυσική
Issue Date: 19-Jan-2015
2009
Date of availability: 19-Jan-2015
Publisher: IOP Publishing Ltd
Abstract: The dominant powder scintillator in most medical imaging modalities for decades has been Gd2O2S:Tb due to the very good intrinsic properties and overall efficiency. Apart from Gd2O2S:Tb, there are alternative powder phosphor scintillators such as Lu2SiO5:Ce and Gd2O2S:Eu that have been suggested for use in various medical imaging modalities. Gd2O2S:Eu emits red light and can be combined mainly with digital mammography detectors such as CCDs. Lu2SiO5:Ce emits blue light and can be combined with blue sensitivity films, photocathodes and some photodiodes. For the purposes of the present study, two scintillating screens, one from Lu2SiO5:Ce and the other from Gd2O2S:Eu powders, were prepared using the method of sedimentation. The screen coating thicknesses were 25.0 and 33.1 mg cm−2 respectively. The screens were investigated by evaluating the following parameters: the output signal, the modulation transfer function, the noise equivalent passband, the informational efficiency, the quantum detection efficiency and the zero-frequency detective quantum efficiency. Furthermore, the spectral compatibility of those materials with various optical detectors was determined. Results were compared to published data for the commercially employed 'Kodak Min-R film-screen system', based on a 31.7 mg cm−2 thick Gd2O2S:Tb phosphor. For Gd2O2S:Eu, MTF data were found comparable to those of Gd2O2S:Tb, while the MTF of Lu2SiO5:Ce was even higher resulting in better spatial resolution and image sharpness properties. On the other hand, Gd2O2S:Eu was found to exhibit higher output signal and zero-frequency detective quantum efficiency than Lu2SiO5:Ce.
Language: English
Citation: Michail, C., Fountos, G., David, S., Valais, I., Toutountzis, A., et al. (October 2009). A comparative investigation of Lu2SiO5:Ce and Gd2O2S:eu powder scintillators for use in x-ray mammography detectors. Measurement Science and Technology. 20(10). pp. 1-9. IOP Publishing Ltd. Available from: http://iopscience.iop.org
Journal: Measurement Science and 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
URI: http://hdl.handle.net/11400/4254
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