Please use this identifier to cite or link to this item: http://hdl.handle.net/11400/8251
Title: An experimental method for the determination of spatial-frequency-dependent detective quantum efficiency (DQE) of scintillators used in X-ray imaging detectors
Authors: Κανδαράκης, Ιωάννης Σ.
Κάβουρας, Διονύσης Α.
Παναγιωτάκης, Γεώργιος Σ.
Τριάντης, Δήμος Α.
Νομικός, Κωνσταντίνος Δ.
Item type: Journal article
Keywords: Imaging scintillators;Medical imaging devices;Optical detector imaging properties;Σπινθηριστές απεικόνισης;Ιατρικές συσκευές απεικόνισης;Ιδιότητες απεικόνισης οπτικού ανιχνευτή
Subjects: Medicine
Medical physics
Ιατρική
Ιατρική φυσική
Issue Date: 5-Apr-2015
11-Nov-1997
Date of availability: 5-Apr-2015
Publisher: Elsevier
Abstract: The spatial-frequency-dependent detective quantum efficiency (DQE) of imaging scintillators was studied independently of the optical detector (film, photocathode, or photodiode) employed in medical imaging devices. A method was developed to experimentally determine the scintillator DQE in terms of its luminescence efficiency (LE), quantum detection efficiency, modulation transfer function, and light emission spectrum. Gd2O2S : Tb, La2O2S : Tb, Y2O2S : Tb and ZnSCdS : Ag scintillating screens were prepared in laboratory and were excited to luminescence by a medical X-ray tube. Maximum DQE values varied between 0.13 and 0.33 depending on the scintillator material, the screen coating weight, and the tube voltage; Gd2O2S : Tb was superior to La2O2S : Tb followed by ZnSCdS : Ag and Y2O2S : Tb. This ranking was maintained at frequencies up to 100 cycles/cm. Considering the same material, DQE of thin screens was found superior to DQE of thicker screens at medium-to-high frequencies. The proposed method allows for the comparison of imaging characteristics of scintillating materials without the inclusion of optical detector imaging properties.
Language: English
Citation: KANDARAKIS, I.S., CAVOURAS, D.A., PANAYIOTAKIS, G.S., TRIANTIS, D.A. & NOMICOS, C.D. (1997). An experimental method for the determination of spatial-frequency-dependent detective quantum efficiency (DQE) of scintillators used in X-ray imaging detectors. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. [Online] 399 (2-3). p.335-342. Available from: http://www.sciencedirect.com/ [Accessed 17/05/1998]
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
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/11400/8251
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