Search Results - "Fountos, G"

Characterization of breast calcification types using dual energy x-ray method by Martini, N, Koukou, V, Fountos, G, Michail, C, Bakas, A, Kandarakis, I, Speller, R, Nikiforidis, G

“…Calcifications are products of mineralization whose presence is usually associated with pathological conditions. The minerals mostly seen in several diseases…”
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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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Bone calcium/phosphorus ratio determination using dual energy X-ray method by Sotiropoulou, P, Fountos, G, Martini, N, Koukou, V, Michail, C, Kandarakis, I, Nikiforidis, G

“…Abstract Non-invasive dual energy methods have been used extensively on osteoporosis diagnosis estimating parameters, such as, Bone Mineral Density (BMD) 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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Studying the luminescence efficiency of Lu2O3:Eu nanophosphor material for digital X-ray imaging applications by Kalyvas, N., Liaparinos, P., Michail, C., David, S., Fountos, G., Wójtowicz, M., Zych, E., Kandarakis, I.

“…Scintillator materials are widely used in X-ray medical imaging detector applications, coupled with available photoreceptors like radiographic film or…”
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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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Polynomial dual energy inverse functions for bone Calcium/Phosphorus ratio determination and experimental evaluation by Sotiropoulou, P., Fountos, G., Martini, N., Koukou, V., Michail, C., Kandarakis, I., Nikiforidis, G.

“…An X-ray dual energy (XRDE) method was examined, using polynomial nonlinear approximation of inverse functions for the determination of the bone…”
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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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A novel easy-to-use phantom for the determination of MTF in SPECT scanners by Fountos, G. P., Michail, C. M., Zanglis, A., Samartzis, A., Martini, N., Koukou, V., Kalatzis, I., Kandarakis, I. S.

“…Purpose: To evaluate modulation transfer function (MTF) in single photon emission computed tomography (SPECT) systems using the line spread function (LSF)…”
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Pencil Beam Spectral Measurements of Ce, Ho, Yb, and Ba Powders for Potential Use in Medical Applications by Fountos, George P., Kandarakis, Ioannis S., Kalyvas, Nektarios E., Sotiropoulou, P., Michail, Christos M., Koukou, V., Martini, N., Nikiforidis, G.

“…The aim of the present study was to obtain modified X-ray spectra, by using appropriate filter materials for use in applications such as dual energy X-ray…”
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Towards task-based assessment of PET performance: System and object DQE across different reconstruction algorithms by Samartzis, A, Fountos, G, Kastis, G.A, Kounadi, E, Datseris, I, Kandarakis, I, Nikiforidis, G

“…Introduction Detective quantum efficiency (DQE) of an imaging system is an indicator of the image quality metrics of the system taking into consideration…”
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Dual Energy Method for Breast Imaging: A Simulation Study by Fountos, George P., Nikiforidis, G., Kalyvas, Nektarios E., Fountzoula, C., Sotiropoulou, P., Michail, Christos M., Martini, N., Koukou, V., Kandarakis, Ioannis S.

“…Dual energy methods can suppress the contrast between adipose and glandular tissues in the breast and therefore enhance the visibility of calcifications. In…”
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