Please use this identifier to cite or link to this item: http://hdl.handle.net/11400/4255
Title: Modeling quantum noise of phosphors used in medical X-ray imaging detectors
Authors: Καλύβας, Νεκτάριος Ι.
Κανδαράκης, Ιωάννης Σ.
Κάβουρας, Διονύσης Α.
Κωσταρίδου, Ελένη
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
1999
Date of availability: 19-Jan-2015
Publisher: Elsevier Science Ltd
Abstract: The noise properties of the granular phosphor screens, which are utilized in X-ray imaging detectors, are studied in terms of the quantum noise transfer function (QNTF). An analytical model, taking into account the effect of K-characteristic X-rays reabsorption within the phosphor material and the optical properties of the phosphor, was developed. The optical properties of the phosphor material required by the model were obtained from literature, except for the optical diffusion length (σ) that was determined by data fitting and was found to be 26 cm2/g. The deviation between theoretical and experimental data is σ depended. Specifically for σ=26 cm2/g and σ=25 cm2/g the respective deviations between experimental and predicted results were 0.698% and −1.597%. However for relative differences in σ more than 15% from the value 26 cm2/g, the corresponding deviations exceed by 6 times the value of 0.698%. The model was tested via comparison to experimental results obtained by a set of Y2O3:Eu3+ phosphor screens prepared by sedimentation. The model may be used to evaluate the effect of screen thickness and irradiation geometry on quantum noise of phosphor materials for transmission and reflection mode.
Language: English
Citation: Kalivas, N., Kandarakis, I., Cavouras, D., Costaridou, L., Nomicos, C., et al. (July 1999). Modeling quantum noise of phosphors used in medical X-ray imaging detectors. Nuclear Instruments and Methods in Physics Research A. 430(2-3). pp. 559–569. Elsevier Science Ltd. Available from: http://www.sciencedirect.com [Accessed 29/06/1999]
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/11400/4255
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