Please use this identifier to cite or link to this item: http://hdl.handle.net/11400/4322
Title: Estimation of the information content of medical images produced by scintillators interacting with diagnostic X-ray beams
Authors: Κανδαράκης, Ιωάννης Σ.
Κάβουρας, Διονύσης Α.
Καλύβας, Νεκτάριος Ι.
Νομικός, Κωνσταντίνος Δ.
Παναγιωτάκης, Γεώργιος Σ.
Item type: Journal article
Keywords: Quantum efficiency;X-ray beam;Κβαντική απόδοση;Δέσμη ακτίνων Χ
Subjects: Medicine
Physics
Ιατρική
Φυσική
Issue Date: 20-Jan-2015
1999
Date of availability: 20-Jan-2015
Publisher: Elsevier Science Ltd
Abstract: The information content of medical images produced by X-ray beam–scintillator interaction was assessed by a method involving detective quantum efficiency (DQE) and information capacity determination. The method was based on emitted light fluence and modulation transfer function (MTF) measurements and it was employed to evaluate the performance of (Gd0.5La0.5)2O2S:Tb scintillator, which was used in the form of laboratory prepared scintillator screens with coating weights ranging between 20 and 139 mg/cm2. Screens were excited to luminescence using 80 and 120 kVp X-ray beams. The scintillator layer exhibited the highest DQE at zero spatial frequency. Thick scintillator layers displayed higher DQE values in the low frequency range while at high frequencies the DQE of thin scintillators were higher. Additionally, thin scintillator layers showed slow DQE variation with increasing frequency. The information capacity of scintillator layers decreased with increasing coating weight indicating that the information content of images produced by thin scintillating layers is higher and more evenly distributed with respect to spatial frequencies.
Language: English
Citation: Kandarakis, I., Cavouras, D., Kalivas, N., Nomicos, C. and Panayiotakis, G. (July 1999). Estimation of the information content of medical images produced by scintillators interacting with diagnostic X-ray beams. Nuclear Instruments and Methods in Physics Research B. 155(1-2). pp. 199–205. Elsevier Science Ltd. Available from: http://www.sciencedirect.com [Accessed 10/08/1999]
Journal: Nuclear Instruments and Methods in Physics Research B
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/11400/4322
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