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|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|
|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.|
|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|
|Appears in Collections:||Δημοσιεύσεις|
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