Report/Journal Article

PUBDB-2016-04019

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Characterization studies of silicon photomultipliers and crystals matrices for a novel time of flight PET detector

Auffray, E. ; Hadj, F. B. M. B. ; Cortinovis, D. (Corresponding author)DESY* ; Doroud, K. ; Garutti, E.Extern* ; Lecoq, P. ; Liu, Z. ; Martinez, R. ; Paganoni, M. ; Pizzichemi, M. ; Silenzi, A.XFEL.EU*DESY* ; Xu, C.Extern* ; Zvolský, M.Extern*

2015
Inst. of Physics London

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Please use a persistent id in citations: doi:10.1088/1748-0221/10/06/P06009  doi:10.3204/PUBDB-2016-04019

Report No.: arXiv:1501.04233

Abstract: his paper describes the characterization of crystal matrices and silicon photomulti-plier arrays for a novel Positron Emission Tomography (PET) detector, namely the external plateof the EndoTOFPET-US system. The EndoTOFPET-US collaboration aims to integrate Time-Of-Flight PET with ultrasound endoscopy in a novel multimodal device, capable to support thedevelopment of new biomarkers for prostate and pancreatic tumors. The detector consists in twoparts: a PET head mounted on an ultrasound probe and an external PET plate. The challenginggoal of 1 mm spatial resolution for the PET image requires a detector with small crystal size, andtherefore high channel density: 4096 LYSO crystals individually readout by Silicon Photomulti-pliers (SiPM) make up the external plate. The quality and properties of these components must beassessed before the assembly. The dark count rate, gain, breakdown voltage and correlated noiseof the SiPMs are measured, while the LYSO crystals are evaluated in terms of light yield and en-ergy resolution. In order to effectively reduce the noise in the PET image, high time resolutionfor the gamma detection is mandatory. The Coincidence Time Resolution (CTR) of all the SiPMsassembled with crystals is measured, and results show a value close to the demanding goal of 200ps FWHM. The light output is evaluated for every channel for a preliminary detector calibration,showing an average of about 1800 pixels fired on the SiPM for a 511 keV interaction. Finally, theaverage energy resolution at 511 keV is about 13 %, enough for effective Compton rejection.

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Contributing Institute(s):

1. XFEL (ZEU-XFEL)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF3-611) (POF3-611)
2. ENDOTOFPET-US - Novel multimodal endoscopic probes for simultaneous PET/ultrasound imaging for image-guided interventions (256984) (256984)

Experiment(s):

1. Experiments at XFEL

Appears in the scientific report 2015

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Database coverage:
; ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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