Title :
Comparison of end/side scintillator readout with digital-SiPM for ToF PET
Author :
Jung Yeol Yeom ; Vinke, Ruud ; Bieniosek, Matthew F. ; Levin, Craig S.
Author_Institution :
Dept. of Radiol., Stanford Univ., Stanford, CA, USA
fDate :
Oct. 27 2013-Nov. 2 2013
Abstract :
Side-readout of scintillation light from crystal elements in PET is an alternative to conventional end-readout configurations, with the benefit of being able to provide fine depth-of-interaction (DOI) information and good energy resolution while achieving excellent timing resolution required for time-of-flight PET. In this study, the performance of discrete LYSO scintillation elements read out from the end/side with digital silicon photomultipliers (dSiPM) has been assessed. Compared to 3 × 3 × 20 mm3 LYSO crystals read out from their ends that gave a coincidence resolving time (CRT) of 162 ± 7 ps FWHM and saturated energy spectra, a side-readout configuration achieved an excellent CRT of 144 ± 2 ps FWHM after correcting for timing skews within the dSiPM and an energy resolution of 11.8 ± 0.2% without requiring energy saturation correction. On the other hand, with smaller 3 × 3 × 5 mm3 LYSO crystals that can also be tiled/stacked to provide DOI information, a timing resolution of 134 ± 6 ps was attained but produced highly saturated energy spectra.
Keywords :
photomultipliers; positron emission tomography; readout electronics; silicon; solid scintillation detectors; CRT; DOI information; FWHM; ToF PET; coincidence resolving time; conventional end-readout configurations; dSiPM; depth-of-interaction information; digital silicon photomultipliers; digital-SiPM; discrete LYSO crystal scintillation element read out; end/side scintillator readout; energy resolution; energy saturation correction; saturated energy spectra; scintillation light; side-readout configuration; time-of-flight PET; timing resolution; timing skews; Crystals; Detectors; Energy resolution; Photonics; Positron emission tomography; Tiles; Timing; Digital silicon photomultipliers; depth-of-interaction (DOI); positron emission tomography (PET); time-of-flight;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2013 IEEE
Conference_Location :
Seoul
Print_ISBN :
978-1-4799-0533-1
DOI :
10.1109/NSSMIC.2013.6829322