Browsing by Author "David, S."
Now showing items 1-14 of 14
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Design considerations for application of SiPMs in nuclear imaging
Efthimiou, N.; Argyropoulos, G.; Georgiou, M.; Fysikopoulos, E.; David, S.; Loudos, G.; Panayiotakis, G. (2010)Silicon Photomultiplier (SiPM) detectors are attractive candidates for the replacement of Photomultipliers in nuclear imaging. They are compact, provide high gain with low Vbias and have fast response. In addition, SiPMs ... -
Development of a SIPM based gamma-ray imager using a Gd3Al 2Ga3O12:Ce (GAGG:Ce) scintillator array
Georgiou, M.; David, S.; Fysikopoulos, E.; Loudos, G. (2013)In this study we present the performance evaluation of a 6×6 Gd3Al2Ga3O12:Ce (GAGG:Ce) pixellated scintillator with 2×2×5mm 3 crystal size elements, coupled to a silicon photomultiplier array (ArraySL-4). Evaluation was ... -
An efficient implementation on a low cost FPGA for photon detection in nuclear imaging
Fysikopoulos, E.; Georgiou, M.; Efthimiou, N.; David, S.; Loudos, G.; Matsopoulos, G. (2010)The aim of this study is to propose and evaluate a simple, open source, data acquisition (DAQ) tool, which provides accurate results for nuclear imaging applications. For this purpose a Xilinx Spartan3E Starter Kit, which ... -
Evaluation of a SiPM array coupled to a Gd3Al2Ga3O12: Ce (GAGG: Ce) discrete scintillator
David, S.; Georgiou, M.; Fysikopoulos, E.; Loudos, G. (2015)Purpose: In this study, we present the results of the evaluation of the SensL ArraySL-4 photo-detector, coupled to a 6×6 GAGG:Ce scintillator array, with 2×2×5mm3 crystal size elements for possible applications in medical ... -
Evaluation of an imaging gamma probe based on R8900U-00-C12 PSPMT
Georgiou, M.; David, S.; Papadimitroulas, P.; Fysikopoulos, E.; Bregou, A.; Loudos, G.; Georgoulias, P. (2012)In this study we present the construction and the evaluation of a gamma probe based on a R8900U-00-C12 position sensitive photomultiplier tube coupled to a pixelated CsI(Tl) crystal array with 2mm x 2mm x 3mm crystal ... -
Evaluation of powder/granular Gd2O2S:Pr scintillator screens in single photon counting mode under 140 keV excitation
David, S.; Georgiou, M.; Loudos, G.; Michail, C.; Fountos, G.; Kandarakis, I. (2013)The aim of this paper is the evaluation of an alternative, low cost solution for the gamma detector in planar imaging. It is based on a powder scintillator, well established in X-ray imaging, and could be further exploited ... -
Experimental and simulation studies for the optimization of dedicated scintimammography cameras
Georgiou, M.; David, S.; Loudos, G.; Tsougos, I.; Georgoulias, P. (2012)The main drawback of scintimammography with conventional gamma cameras is the large distance between detector and breast, which limits imaging performance and adds significant background noise from the heart and other ... -
Experimental and Simulation Studies for the Optimization of Dedicated Scintimammography Cameras
Georgiou, M.; Loudos, G.; David, S.; Georgoulias, P. (2010) -
Fully Digital FPGA-Based Data Acquisition System for Dual Head PET Detectors
Fysikopoulos, E.; Georgiou, M.; Efthimiou, N.; David, S.; Loudos, G.; Matsopoulos, G. (2014)We present the development of a new fully digital, flexible, cost-efficient data acquisition system (DAQ) suitable for dual head Positron Emission Tomography (PET) scanners for small animal imaging applications. A free-running ... -
Imaging performance of silicon photomultipliers coupled to BGO and CsI: Na arrays
David, S.; Georgiou, M.; Fysikopoulos, E.; Belcari, N.; Loudos, G. (2013)The aim of this study is to investigate the imaging performance of a silicon photomultiplier array (ArraySL-4) photodetector for possible PET and potentially SPECT applications using BGO and CsI(Na) pixellated scintillators. ... -
Initial results on SiPM array based on a symmetric resistive voltage division readout
David, S.; Georgiou, M.; Fysikopoulos, E.; Efthimiou, N.; Paipais, T.; Kefalidis, L.; Loudos, G. (2012)The aim of this study is to design and apply a symmetric resistive voltage division matrix to read out the compact silicon photomultiplier array (SPMArray2 by SensL) photodetector for possible applications as gamma or PET ... -
Initial results on SiPMs performance for use in medical imaging
Efthimiou, N.; Georgiou, M.; Argyropoulos, G.; Fysikopoulos, E.; David, S.; Loudos, G.; Panayiotakis, G. (2011)Silicon photomultiplier (SiPMs) detectors are attractive candidates for replacing position sensitive photomultipliers in nuclear imaging. They are compact, they provide high gain with low bias voltage and show better ... -
A Spartan 6 FPGA-based data acquisition system for dedicated imagers in nuclear medicine
Fysikopoulos, E.; Loudos, G.; Georgiou, M.; David, S.; Matsopoulos, G. (2012)We present the development of a four-channel low-cost hardware system for data acquisition, with application in dedicated nuclear medicine imagers. A 12 bit octal channel high-speed analogue to digital converter, with up ... -
A Spartan3E-based low-cost system for gamma-ray detection in small single photon emission computed tomography or positron emission tomography systems
Fysikopoulos, E.; Georgiou, M.; Efthimiou, N.; David, S.; Loudos, G.; Matsopoulos, G. (2011)The development and assessment of a readout system based on field programmable gate arrays (FPGA) for dedicated nuclear medicine cameras is presented. We have used Xilinx Spartan3E starter kit, which is one of the simplest ...