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.
Tsoukos, S;
Kateris, A;
Kalivas, N;
Spyrou, G;
Panayiotakis, G;
[1]
Kandarakis, I;
Gavouras, D
[2]
- Department of Medical Physics, School of Medicine, University of Patras, 265 00 pAtras (Greece)
- Department of Medical Instrumentation Technology, Technological Educational Institution of Athens (Greece)
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}
}
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}
}