Please use this identifier to cite or link to this item: http://hdl.handle.net/11400/4256
Title: Modeling quantum and structure noise of phosphors used in medical X-ray imaging detectors
Authors: Καλύβας, Νεκτάριος Ι.
Κωσταρίδου, Ελένη
Κανδαράκης, Ιωάννης Σ.
Κάβουρας, Διονύσης Α.
Νομικός, Κωνσταντίνος Δ.
Contributors: Παναγιωτάκης, Γεώργιος Σ.
Item type: Journal article
Keywords: Phosphor detector;Quantum noise;Ανιχνευτής φωσφόρου;Κβαντικός θόρυβος
Subjects: Medicine
Physics
Ιατρική
Φυσική
Issue Date: 19-Jan-2015
2002
Date of availability: 19-Jan-2015
Publisher: Elsevier Science Ltd
Abstract: The noise properties of granular phosphors used in X-ray imaging detectors are studied in terms of a noise transfer function, NTF. This study is performed in high-exposure conditions where the contribution of structure noise to total screen noise is considerable. An analytical model, based on the cascaded linear systems methodology presented in the literature, is developed. This model takes into account the quantum noise and structure noise. Furthermore, it considers the effect of the K X-rays reabsorption on the phosphor material and the effect of screen thickness on the NTF. The model was validated against experimental results obtained by a set of Zn2SiO4:Mn phosphor screens prepared by sedimentation. The model may be used to evaluate the effect of screen thickness and the effect of the characteristic X-rays on NTF in high-exposure conditions where structure noise is considerable.
Language: English
Citation: Kalivas, N., Costaridou, L., Kandarakis, I., Cavouras, D., Nomicos, C., et al. (September 2002). Modeling quantum and structure noise of phosphors used in medical X-ray imaging detectors. Nuclear Instruments and Methods in Physics Research A. 490(3). pp. 614–629. Elsevier Science Ltd. Available from: http://www.sciencedirect.com [Accessed 13/06/2002]
Journal: Nuclear Instruments and Methods in Physics Research A
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/11400/4256
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