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A theoretical model predicting the intensity of emitted light per unit of x-ray exposure in radiographic screens

Abstract

A theoretical model predicting the intensity of light emitted by x-ray imaging phosphor screens per unit of area and time over incident x-ray flux (absolute efficiency) was developed. The model takes into account : A) the structure of the screens which consists of luminescent grains embedded in a binding matrix. B) the direct deposition of energy by x-ray absorption effects.. C) the re-absorption of K fluorescence characteristic x-rays produced when the x-ray energy exceeds the energy of the K absorption edge of the phosphor material. To test the model a set of (Gd,La)2O2S:Tb phosphor screens was prepared by sedimentation in the laboratory. Experimental absolute efficiency data were obtained at x-ray tube voltage range from 40 to 160 kVp. The coincidence between experimental and theoretical results were satisfactory. (authors) 7 refs., 4 figs.
Authors:
Tsoukos, S; Kateris, A; Kalivas, N; Spyrou, G; Panayiotakis, G; [1]  Kandarakis, I; Gavouras, D [2] 
  1. Department of Medical Physics, School of Medicine, University of Patras, 265 00 pAtras (Greece)
  2. Department of Medical Instrumentation Technology, Technological Educational Institution of Athens (Greece)
Publication Date:
Dec 31, 1998
Product Type:
Conference
Report Number:
INIS-CY-0004; CONF-9806202-
Reference Number:
SCA: 550602; PA: AIX-30:017085; EDB-99:043352; SN: 99002082128
Resource Relation:
Conference: 8. Mediterranean conference on medical and biological engineering and computing (Medicon `98), Lemesos (Cyprus), 14-17 Jun 1998; Other Information: DN: 7 refs., 4 figs. The proceedings of this meeting are available on CD-ROM in PDF, at the price of US$50, from the Cyprus Association of Medical Physics and Biomedical Engineering, P.O.Box 24039, 1700 Nicosia, Cyprus. The CD-ROM makes use of Abode Acrobat PDF (Portable Document Format). To read the files the Abode Acrobat reader has to be installed on your system. A copy is provided with the CD-ROM; PBD: 1998; Related Information: Is Part Of Proceedings of the 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon `98); Christofides, Stelios; Pattichis, Constantinos; Schizas, Christos; Keravnou-Papailiou, Elpida; Kaplanis, Prodromos; Spyros, Spyrou; Christodoulides, George; Theodoulou, Yiannis [eds.]; PB: 220 p.
Subject:
55 BIOLOGY AND MEDICINE, BASIC STUDIES; PHOSPHORS; RADIOLOGY; X-RAY DETECTION; X-RAY RADIOGRAPHY
OSTI ID:
331892
Research Organizations:
Cyprus Association of Medical Physics and Biomedical Engineering (CAMPBE), Nicosia (Cyprus); The Department of Computer Science, University of Cyprus, Nicosia (Cyprus)
Country of Origin:
Cyprus
Language:
English
Other Identifying Numbers:
Other: ON: DE99619912; ISBN 9963-607-14-4; TRN: CY9900008017085
Availability:
INIS; OSTI as DE99619912
Submitting Site:
INIS
Size:
pp. 73
Announcement Date:

Citation Formats

Tsoukos, S, Kateris, A, Kalivas, N, Spyrou, G, Panayiotakis, G, Kandarakis, I, and Gavouras, D. A theoretical model predicting the intensity of emitted light per unit of x-ray exposure in radiographic screens. Cyprus: N. p., 1998. Web.
Tsoukos, S, Kateris, A, Kalivas, N, Spyrou, G, Panayiotakis, G, Kandarakis, I, & Gavouras, D. A theoretical model predicting the intensity of emitted light per unit of x-ray exposure in radiographic screens. Cyprus.
Tsoukos, S, Kateris, A, Kalivas, N, Spyrou, G, Panayiotakis, G, Kandarakis, I, and Gavouras, D. 1998. "A theoretical model predicting the intensity of emitted light per unit of x-ray exposure in radiographic screens." Cyprus.
@misc{etde_331892,
title = {A theoretical model predicting the intensity of emitted light per unit of x-ray exposure in radiographic screens}
author = {Tsoukos, S, Kateris, A, Kalivas, N, Spyrou, G, Panayiotakis, G, Kandarakis, I, and Gavouras, D}
abstractNote = {A theoretical model predicting the intensity of light emitted by x-ray imaging phosphor screens per unit of area and time over incident x-ray flux (absolute efficiency) was developed. The model takes into account : A) the structure of the screens which consists of luminescent grains embedded in a binding matrix. B) the direct deposition of energy by x-ray absorption effects.. C) the re-absorption of K fluorescence characteristic x-rays produced when the x-ray energy exceeds the energy of the K absorption edge of the phosphor material. To test the model a set of (Gd,La)2O2S:Tb phosphor screens was prepared by sedimentation in the laboratory. Experimental absolute efficiency data were obtained at x-ray tube voltage range from 40 to 160 kVp. The coincidence between experimental and theoretical results were satisfactory. (authors) 7 refs., 4 figs.}
place = {Cyprus}
year = {1998}
month = {Dec}
}