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CERN Document Server 2,046 のレコードが見つかりました。  1 - 10次最後  レコードへジャンプ： 検索にかかった時間： 7.66 秒 
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/ Turtos, R M (CERN ; Milan Bicocca U.) ; Gundacker, S (CERN ; Milan Bicocca U.) ; Auffray, E (CERN ; Milan Bicocca U.) ; Lecoq, P (CERN ; Milan Bicocca U.)
Achieving fast timing in positron emission tomography (PET) at the level of few tens of picoseconds of picoseconds is limited by the photon emission rate of existent materials with standard scintillation mechanisms. This has led to consider quantum confined excitonic sub-1 ns emission in semiconductors as a viable solution to enhance the amount of fast-emitted photons produced per gamma event. [...]
2019 - Published in : Phys. Med. Biol. 64 (2019) 185018 Fulltext: PDF;
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A Fast Timing Layer Concept for a Compton-TOF-PET Module / Cala’, Roberto (CERN ; Milan Bicocca U.) ; Kratochwil, Nicolaus (CERN ; U. Vienna (main)) ; Gundacker, Stefan (RWTH Aachen U.) ; Polesel, Andrea (CERN ; Milan Bicocca U.) ; Paganoni, Marco (Milan Bicocca U.) ; Auffray, Etiennette (CERN) ; Pizzichemi, Marco (CERN)
The possibility to improve depth of interaction (DOI) resolution and coincidence time resolution (CTR) of a pixellated PET module by enabling light re-circulation inside it with a light guide is well known. Typically the light guide consists of a non-scintillating material of about 1 mm thickness. [...]
2021 - 5 p. - Published in : 10.1109/NSS/MIC44867.2021.9875612
In : IEEE NSS MIC 2021, Online, Japan, 16 - 23 Oct 2021, pp.1-5
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Experimental time resolution limits of modern SiPMs and TOF-PET detectors exploring different scintillators and Cherenkov emission / Gundacker, Stefan (Milan Bicocca U. ; CERN) ; Martinez Turtos, Rosana (CERN) ; Kratochwil, Nicolaus (CERN ; Vienna U.) ; Pots, Rosalinde Hendrika (CERN ; RWTH Aachen U.) ; Paganoni, Marco (Milan Bicocca U. ; CERN) ; Lecoq, Paul (CERN) ; Auffray, Etiennette (CERN)
Solid state photodetectors like silicon photomultipliers (SiPMs) are playing an important role in several fields of medical imaging, life sciences and high energy physics. They are able to sense optical photons with a single photon detection time precision below 100 ps, making them ideal candidates to read the photons generated by fast scintillators in time of flight positron emission tomography (TOF-PET). [...]
2020 - 20 p. - Published in : Phys. Med. Biol. 65 (2020) 025001 Fulltext: PDF;
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Advances in heterostructured scintillators: toward a new generation of detectors for TOF-PET / Pagano, Fiammetta (CERN ; Milan Bicocca U.) ; Kratochwil, Nicolaus (CERN ; Vienna U.) ; Salomoni, Matteo (CERN) ; Pizzichemi, Marco (CERN ; Milan Bicocca U.) ; Paganoni, Marco (CERN ; Milan Bicocca U.) ; Auffray, Etiennette (CERN)
Objective. Time-of-flight-positron emission tomography would highly benefit from a coincidence time resolution (CTR) below 100 ps: improvement in image quality and patient workflow, and reduction of delivered dose are among them. [...]
2022 - 12 p. - Published in : Phys. Med. Biol. 67 (2022) 135010 Fulltext: PDF;
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Timing performance of ZnO:Ga nanopowder composite scintillators / Turtos, Rosana M (Milan Bicocca U.) ; Gundacker, Stefan (CERN) ; Lucchini, Marco T (CERN) ; Procházková, Lenka (Prague, Tech. U.) ; Čuba, Václav (Prague, Tech. U.) ; Burešová, Hana ; Mrázek, Jan (ASCR, Prague) ; Nikl, Martin (Prague, Inst. Phys.) ; Lecoq, Paul (CERN) ; Auffray, Etiennette (CERN)
The implementation of nanocrystal-based composite scintilla-tors as a new generation of ultrafast particle detectors is ex-plored using ZnO:Ga nanopowder. Samples are characterized with a spectral-time resolved photon counting system and pulsed X-rays, followed by coincidence time resolution(CTR) measurements under 511 keV gamma excitation. [...]
2016 - 5 p. - Published in : Phys. Status Solidi RRL 10 (2016) 843-847
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Metascintillators: New Results for TOF-PET Applications / Lecoq, P (CERN ; Valencia, Polytechnic U.) ; Konstantinou, G ; Latella, R ; Moliner, L (Valencia, Polytechnic U.) ; Nuyts, J (Leuven U.) ; Zhang, L ; Barrio, J (Valencia, Polytechnic U.) ; Benlloch, J M (Valencia, Polytechnic U.) ; Gonzalez, A J (Valencia, Polytechnic U.)
We report on the progress on a first generation of realistic size metascintillators for time-of-flight PET. These heterostructures combine dense LYSO or BGO plates, interleaved with fast scintillator layers producing a bunch of prompt photons from the energy leakage of the recoil photoelectric electron. [...]
2022 - 7 p. - Published in : IEEE Trans. Rad. Plasma Med. Sci. 6 (2022) 510-516 External link: preprint
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High-frequency SiPM readout advances measured coincidence time resolution limits in TOF-PET / Gundacker, Stefan (Milan Bicocca U. ; CERN) ; Turtos, Rosana Martinez (CERN) ; Auffray, Etiennette (CERN) ; Paganoni, Marco (Milan Bicocca U.) ; Lecoq, Paul (CERN)
Scintillator based radiation detectors readout by SiPMs successively break records in their reached time resolution. Nevertheless, new challenges in time of flight positron emission tomography (TOF-PET) and high energy physics are setting unmatched goals in the 10 ps range. [...]
2019 - 10 p. - Published in : Physics in Medicine & Biology 64 (2019) 055012 Fulltext: PDF;
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Precise rise and decay time measurements of inorganic scintillators by means of X-ray and 511 keV excitation / Gundacker, S (Milan Bicocca U. ; CERN) ; Turtos, R M (Milan Bicocca U. ; CERN) ; Auffray, E (CERN) ; Lecoq, P (CERN)
The emergence of new solid-state avalanche photodetectors, e.g. SiPMs, with unprecedented timing capabilities opens new ways to profit from ultrafast and prompt photon emission in scintillators. [...]
2018 - 11 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 891 (2018) 42-52 Fulltext: PDF;
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Pushing Cherenkov PET with BGO via coincidence time resolution classification and correction / Kratochwil, Nicolaus (CERN ; Vienna U. ; [email protected]) ; Gundacker, Stefan (CERN ; Milan Bicocca U.) ; Lecoq, Paul (CERN) ; Auffray, Etiennette (CERN)
Bismuth germanate (BGO) shows good properties for positron emission tomography (PET) applications, but was substituted by the development of faster crystals like lutetium oxyorthosilicate (LSO) for time-of-flight PET (TOF-PET). Recent improvements in silicon photomultipliers (SiPMs) and fast readout electronics make it possible to access the Cherenkov photon signal produced upon 511 keV interaction, which makes BGO a cost-effective candidate for TOF-PET. [...]
2020 - 7 p. - Published in : Phys. Med. Biol. 65 (2020) 115004 Fulltext: PDF;
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Machine learning-based events classification in heterostructured scintillators / Lowis, C (CERN ; RWTH Aachen U.) ; Pagano, F (CERN ; Milan Bicocca U.) ; Kratochwil, N (CERN) ; Pizzichemi, M (Milan Bicocca U.) ; Langen, K J (RWTH Aachen U.) ; Ziemons, K (Applied Sci. U., Aachen) ; Hillemanns, E Auffray (CERN)
Time-of-flight positron emission tomography (TOF PET) faces the challenge of improving time resolution while maintaining high detector efficiency. Heterostructured scintillators, which consist of multiple layers of different scintillating materials with complementary properties, have emerged as a promising solution. [...]
2023 - 1 p. - Published in : 10.1109/NSSMICRTSD49126.2023.10338326
In : 2023 IEEE Nuclear Science Symposium (NSS), Medical Imaging Conference (MIC) and Room Temperature Semiconductor Detector (RTSD) Conference (2023 IEEE NSS MIC RTSD), Vancouver, Canada, 4 - 11 Nov 2023
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