The performance of silicon photomultipliers in Cherenkov TOF PET
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The performance of silicon photomultipliers in Cherenkov TOF PET Rok Dolenec1*, Samo Korpar1, Peter Krizan2, Rok Pestotink2 From PSMR 2015: 4th Conference on PET/MR and SPECT/MR La Biodola, Isola d’Elba, Italy. 17-21 May 2015 1 Faculty of Chemistry and Chemical Engineering, University of Maribor, Maribor, Slovenia
In time-of-flight positron emission tomography (TOF PET) one of the main factors limiting the time resolution is the time evolution of the scintillation process. This can be avoided by using exclusively the Cherenkov light produced in a suitable material. Sub 100 ps FWHM timing has already been experimentally demonstrated but with a drawback of relatively low detection efficiency due to the photodetectors used. In this work silicon photomultipliers (SiPMs) are considered as a photodetector in Cherenkov TOF PET. The detection efficiency can be significantly improved by using SiPMs, however, at room temperature the SiPM dark counts introduce a significant source of fake coincidences. SiPM samples from different producers were tested in a simple back-toback setup in combination with lead fluoride Cherenkov radiators. Results for coincidence timing, detection efficiency and effects of dark counts at different temperatures and SiPM overvoltages are presented. Authors’ details 1 Faculty of Chemistry and Chemical Engineering, University of Maribor, Maribor, Slovenia. 2Jozef Stefan Institute, Ljubljana, Slovenia. Published: 18 May 2015
doi:10.1186/2197-7364-2-S1-A1 Cite this article as: Dolenec et al.: The performance of silicon photomultipliers in Cherenkov TOF PET. EJNMMI Physics 2015 2(Suppl 1):A1.
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© 2015 Dolenec et al; licensee Springer. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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