Search Results - "VALAIS, I"

Optical emission characteristics of Gd2O2S:Tb powder phosphor under X-ray excitation: the influence of different grain size distributions (GSDs) by Liaparinos, P., Michail, C., Valais, I., Karabotsos, A., Kandarakis, I.

“…Powder phosphor materials consist of a variety of grain sizes glued together in a binder material forming a specific grain size distribution (GSD). Within…”
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Luminescence efficiency of calcium tungstate (CaWO4) under X-ray radiation: Comparison with Gd2O2S:Tb by Michail, C., Valais, I., Fountos, G., Bakas, A., Fountzoula, C., Kalyvas, N., Karabotsos, A., Sianoudis, I., Kandarakis, I.

“…•Α 36.26 mg/cm2 CaWO4 screen was examined under radiographic X-ray energies.•Comparisons with a custom-made PMMA/Gd2O2S:Tb (30.8 mg/cm2) composite film screen…”
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Measurement of the luminescence properties of Gd2O2S:Pr,Ce,F powder scintillators under X-ray radiation by Michail, C., Valais, I., Seferis, I., Kalyvas, N., David, S., Fountos, G., Kandarakis, I.

“…The aim of the present study was to investigate the absolute luminescence efficiency of gadolinium oxysulfide powder scintillators, doped with praseodymium,…”
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Experimental measurement of a high resolution CMOS detector coupled to CsI scintillators under X-ray radiation by Michail, C., Valais, I., Seferis, I., Kalyvas, N., Fountos, G., Kandarakis, I.

“…The purpose of the present study was to assess the information content of structured CsI:Tl scintillating screens, specially treated to be compatible to a CMOS…”
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On the response of GdAlO3:Ce powder scintillators by Michail, C., Kalyvas, N., Valais, I., David, S., Seferis, I., Toutountzis, A., Karabotsos, A., Liaparinos, P., Fountos, G., Kandarakis, I.

“…The aim of the present study was to investigate the luminescence efficiency (XLE) of gadolinium aluminum perovskite (GdAlO3:Ce) powder scintillator. This…”
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Evaluation of Gd2O2S:Pr granular phosphor properties for X-ray mammography imaging by David, S., Michail, C., Seferis, I., Valais, I., Fountos, G., Liaparinos, P., Kandarakis, I., Kalyvas, N.

“…Phosphor materials are widely used in X-ray medical imaging detector applications, coupled with suitable photoreceptors. Upon the most demanding imaging…”
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Light emission efficiency and imaging performance of Lu2O3:Eu nanophosphor under X-ray radiography conditions: Comparison with Gd2O2S:Eu by Seferis, I., Michail, C., Valais, I., Zeler, J., Liaparinos, P., Fountos, G., Kalyvas, N., David, S., Stromatia, F., Zych, E., Kandarakis, I., Panayiotakis, G.

“…Nanocrystallic europium-activated lutetium oxide (Lu2O3:Eu) is a strong candidate for use in digital medical imaging applications, due to its spectroscopic and…”
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Detective quantum efficiency (DQE) of high X-ray absorption Lu2O3:Eu thin screens: the role of shape and size of nano- and micro-grains by Seferis, I. E., Michail, C., Zeler, J., Kalyvas, N., Valais, I., Fountos, G., Bakas, A., Kandarakis, I., Zych, E., Panayiotakis, G. S.

“…The study concerned with the current work is to provide a comparative investigation of the detective quantum efficiency (DQE) of Lu 2 O 3 :Eu phosphor screens,…”
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On the response of a europium doped phosphor-coated CMOS digital imaging detector by Seferis, I.E., Michail, C.M., Valais, I.G., Fountos, G.P., Kalyvas, N.I., Stromatia, F., Oikonomou, G., Kandarakis, I.S., Panayiotakis, G.S.

“…The purpose of the present study was to assess the information content of a high resolution active pixel CMOS imaging sensor coupled to Gd2O2S:Eu phosphor…”
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Light emission efficiency and imaging performance of Gd2O2S:Eu powder scintillator under x‐ray radiography conditions by Michail, C. M., Fountos, G. P., Liaparinos, P. F., Kalyvas, N. E., Valais, I., Kandarakis, I. S., Panayiotakis, G. S.

“…Purpose To evaluate Gd2O2S:Eu powder phosphor as a radiographic image receptor and to compare it to phosphors often used in radiography. Gd2O2S:Eu is…”
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Spatial frequency domain analysis of a commercially available digital dental detector by Anastasiou, A., Papastamati, F., Bakas, A., Michail, C., Koukou, V., Martini, N., Ninos, K., Lavdas, E., Valais, I., Fountos, G., Kandarakis, I., Kalyvas, N.

“…•A dental digital detector was evaluated in spatial frequency domain.•The DQE was calculated for various exposure conditions.•The resolution was found better…”
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Fabrication and Luminescent Properties of Zn–Cu–In–S/ZnS Quantum Dot Films under UV Excitation by Saatsakis, G., Michail, C., Fountzoula, C., Kalyvas, N., Bakas, A., Ninos, K., Fountos, G., Sianoudis, I., Kandarakis, I., Panayiotakis, G.S., Valais, I.

“…Quantum dots (QDs) are quite interesting materials due to their unique chemical and physical properties. ZnCuInS/ZnS QDs can be produced either in hydrophobic…”
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Luminescence efficiency of (Lu,Gd)2SiO5:Ce (LGSO:Ce) crystals under X-ray radiation by Michail, C., David, S., Bakas, A., Kalyvas, N., Fountos, G., Kandarakis, I., Valais, I.

“…The aim of the present study was to investigate the absolute luminescence efficiency (AE) of mixed oxyorthosilicate (Lu,Gd)2SiO5:Ce (LGSO:Ce) single crystals,…”
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On the response of alloyed ZnCdSeS quantum dot films by Valais, I., Michail, C., Fountzoula, C., Tseles, D., Yannakopoulos, P., Nikolopoulos, D., Bakas, A., Fountos, G., Saatsakis, G., Sianoudis, I., Kandarakis, I., Panayiotakis, G.

“…•Four composite ZnCdSeS PMMA/quantum dots films were prepared.•The ZnCdSeS films were excited by ultraviolet light.•The spectral matching optical detectors was…”
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Evaluation of the Luminescence Efficiency of YAG:Ce Powder Scintillating Screens for Use in Digital Mammography Detectors by David, S L, Michail, C M, Roussou, M, Nirgianaki, E, Toutountzis, A E, Valais, I G, Fountos, G, Liaparinos, P F, Kandarakis, I, Panayiotakis, G

“…In the present study scintillating screens prepared from Y 3 Al 5 O 12 :Ce (YAG:Ce) powder phosphor were evaluated for use in digital mammography. YAG:Ce has…”
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X-ray response of a digital detector for dental radiographs by Kalyvas, N, Maragkaki, P, Bakas, A, Fountos, G, Koukou, V, Martini, N, Michail, C, Valais, I, Kandarakis, I

“…Introduction Current dental imaging technology offers indirect detectors capable of digital imaging. These detectors incorporate a scintillator coupled to a…”
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A comparative study of the luminescence properties of LYSO:Ce, LSO:Ce, GSO:Ce and BGO single crystal scintillators for use in medical X-ray imaging by Valais, I, Michail, C, David, S, Nomicos, C.D, Panayiotakis, G.S, Kandarakis, I

“…Abstract The present study is a comparative investigation of the luminescence properties of (Lu,Y)2 SiO5 :Ce (LYSO:Ce), Lu2 SiO5 :Ce (LSO:Ce), Gd2 SiO5 :Ce…”
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Grains size and shape dependence of luminescence efficiency of Lu2O3:Eu thin screens by Seferis, I.E., Zeler, J., Michail, C., David, S., Valais, I., Fountos, G., Kalyvas, N., Bakas, A., Kandarakis, I., Zych, E., Panayiotakis, G.S.

“…•The rod-like grain screens appeared with reduced luminescence efficiency values.•The luminescence curves behaviour at low energy X-rays differs with grains…”
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Imaging performance and light emission efficiency of Lu2 SiO5:Ce (LSO:Ce) powder scintillator under X-ray mammographic conditions by Michail, C., Toutountzis, A., David, S., Kalyvas, N., Valais, I., Kandarakis, I., Panayiotakis, G. S.

“…The aim of the present study was to measure the imaging transfer characteristics and the luminescence efficiency (XLE) of a Lu 2 SiO 5 :Ce (LSO:Ce) powder…”
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Detective quantum efficiency (DQE) of the Dexela 2923MAM detector according to IEC 62220-1-1:2015 by Koukou, V, Martini, N, Vasiloudis, I, Klimi, L, Michail, C, Valais, I, Kalyvas, N, Bakas, A, Kandarakis, I, Nikiforidis, G, Fountos, G

“…Introduction In recent years, digital X-ray imaging devices such as complementary metal oxide semiconductors (CMOS) are widely used in almost all the imaging…”
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