Search Results - "Spanoudaki, V."

Investigating the temporal resolution limits of scintillation detection from pixellated elements: comparison between experiment and simulation by Spanoudaki, V Ch, Levin, C S

“…This study investigates the physical limitations involved in the extraction of accurate timing information from pixellated scintillation detectors for positron…”
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Physical effects of mechanical design parameters on photon sensitivity and spatial resolution performance of a breast-dedicated PET system by Spanoudaki, V. C., Lau, F. W. Y., Vandenbroucke, A., Levin, C. S.

“…Purpose: This study aims to address design considerations of a high resolution, high sensitivity positron emission tomography scanner dedicated to breast…”
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Effect of inter-crystal scatter on estimation methods for random coincidences and subsequent correction by Torres-Espallardo, I, Rafecas, M, Spanoudaki, V, McElroy, D P, Ziegler, S I

“…Random coincidences can contribute substantially to the background in positron emission tomography (PET). Several estimation methods are being used for…”
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Validation of the GATE Monte Carlo simulation platform for modelling a CsI(Tl) scintillation camera dedicated to small-animal imaging by Lazaro, D, Buvat, I, Loudos, G, Strul, D, Santin, G, Giokaris, N, Donnarieix, D, Maigne, L, Spanoudaki, V, Styliaris, S, Staelens, S, Breton, V

“…Monte Carlo simulations are increasingly used in scintigraphic imaging to model imaging systems and to develop and assess tomographic reconstruction algorithms…”
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A true singles list-mode data acquisition system for a small animal PET scanner with independent crystal readout by McElroy, D P, Hoose, M, Pimpl, W, Spanoudaki, V, Schüler, T, Ziegler, S I

“…We present a unique data acquisition system designed to read out signals from the MADPET-II small animal LSO-APD PET tomograph. The scanner consists of 36…”
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Use of a Central Positron Emitting Reference Source to Improve the Timing Alignment of a Singles List-Mode Small Animal PET Scanner by McElroy, D.P., Thompson, C.J., Spanoudaki, V., Ziegler, S.I.

“…To minimize the system-wide timing resolution of a PET scanner, and hence the applied coincidence window, a delay must be added to the signals from each…”
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Tomographic image reconstruction using Artificial Neural Networks by Paschalis, P, Giokaris, N.D, Karabarbounis, A, Loudos, G.K, Maintas, D, Papanicolas, C.N, Spanoudaki, V, Tsoumpas, Ch, Stiliaris, E

“…A new image reconstruction technique based on the usage of an Artificial Neural Network (ANN) is presented. The most crucial factor in designing such a…”
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Design and development of a position-sensitive γ-camera for SPECT imaging based on PCI electronics by Spanoudaki, V, Giokaris, N.D, Karabarbounis, A, Loudos, G.K, Maintas, D, Papanicolas, C.N, Paschalis, P, Stiliaris, E

“…A position-sensitive γ-camera is being currently designed at IASA. This camera will be used experimentally (development mode) in order to obtain an integrated…”
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Crystal and collimator optimization studies of a high-resolution γ-camera based on a position sensitive photomultiplier by Giokaris, N, Loudos, G, Maintas, D, Karabarbounis, A, Spanoudaki, V, Stiliaris, E, Boukis, S, Gektin, A, Boyarintsev, A, Pedash, V, Gayshan, V

“…Studies have been performed in order to optimize the collimator and the crystal of a γ-camera based on a position sensitive photomultiplier with respect its…”
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High-resolution and high-sensitivity SPECT imaging of breast phantoms by Loudos, G.K, Giokaris, N.D, Mainta, K, Sakelios, N, Stiliaris, E, Karabarbounis, A, Papanicolas, C.N, Spanoudaki, V, Nikita, K.S, Uzunoglu, N.K, Archimandritis, S.C, Varvarigou, A.D, Stefanis, K.N, Majewski, S, Weisenberger, A, Pani, R, Maintas, D

“…A small field of view gamma camera based on a Position Sensitive Photomultiplier Tube has been used for tomoscintigraphic imaging of breast phantoms. The…”
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First Performance Results of Ce:GAGG Scintillation Crystals With Silicon Photomultipliers by Jung Yeol Yeom, Yamamoto, S., Derenzo, S. E., Spanoudaki, V. C., Kamada, K., Endo, T., Levin, C. S.

“…A new single-crystal Cerium doped Gd 3 Al 2 Ga 3 O 123 Al 2 Ga 3 O 12 (GAGG) scintillation crystal with high luminosity, high density and relatively fast decay…”
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Physical effects of mechanical design parameters on photonsensitivity and spatial resolution performance of a breast-dedicatedPET system by Spanoudaki, V. C., Lau, F. W. Y., Vandenbroucke, A., Levin, C. S.

“…Purpose: This study aims to address design considerations of a high resolution, high sensitivity positron emission tomography scanner dedicated to breast…”
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Estimating accidental coincidences for pixelated PET detectors and singles list-mode acquisition by Rafecas, M., Torres, I., Spanoudaki, V., McElroy, D.P., Ziegler, S.I.

“…We have studied the validity of random estimation techniques for various low energy thresholds (LETs) and single list-mode data sets in small animal PET. While…”
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Silicon photomultiplier-based detector array for TOF PET by Yeom, J. Y., Spanoudaki, V., Levin, C. S.

“…Time-of-Flight (ToF) information in PET can contribute to a significant improvement in the reconstructed image signal to noise ratio, enabling image contrast…”
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Effect of Temperature on the Performance of Proportional APD-Based Modules for Gamma Ray Detection in Positron Emission Tomography by Spanoudaki, V.C., McElroy, D.P., Torres-Espallardo, I., Ziegler, S.I.

“…MADPET-II is a small animal PET tomograph that features individual lutetium oxyorthosilicate (LSO) crystal readout from avalanche photodiodes (APDs). The…”
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Comparison of CsI(Tl) and CsI(Na) partially slotted crystals for high-resolution SPECT imaging by Giokaris, N., Loudos, G., Maintas, D., Karabarbounis, A., Lembesi, M., Spanoudaki, V., Stiliaris, E., Boukis, S., Sakellios, N., Karakatsanis, N., Gektin, A., Boyarintsev, A., Pedash, V., Gayshan, V.

“…Dedicated systems based on Position Sensitive Photomultiplier Tubes (PSPMTs) coupled to scintillators, have been used over the past years for the construction…”
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An analog signal processing ASIC for a small animal LSO–APD PET tomograph by Spanoudaki, V.Ch, McElroy, D.P., Ziegler, S.I.

“…MADPET-II is a small animal PET scanner currently under development that provides individual readout for each one of its 1152 LSO–APD electronic channels. In…”
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Partially slotted crystals for a high-resolution γ-camera based on a position sensitive photomultiplier by Giokaris, N., Loudos, G., Maintas, D., Karabarbounis, A., Lembesi, M., Spanoudaki, V., Stiliaris, E., Boukis, S., Gektin, A., Pedash, V., Gayshan, V.

“…Partially slotted crystals have been designed and constructed and have been used to evaluate the performance with respect to the spatial resolution of a…”
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Temperature and bias voltage studies of a large area position sensitive Avalanche Photodiode by Vandenbroucke, A., Lee, J., Spanoudaki, V., Lau, F., Reynolds, P.D., Levin, C.S.

“…We are constructing a 1 mm 3 resolution, high sensitivity PET detector system with depth of interaction capability. The detectors are built from modules…”
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Effect of temperature on the stability and performance of an LSO-APD PET scanner by Spanoudaki, V., McElroy, D.P., ZeIl, K., Ziegler, S.I.

“…PET scanners with a large number of individual detectors require an equivalent number of electronics that will collect the detector signals and further process…”
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