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AbstractAbstract
[en] The design and evaluation of a large-area detector module for positron emission imaging applications, is presented. The module features a SensL ArrayC-60035-64P-PCB solid state detector (8×8 array of tileable silicon photomultipliers by SensL, 7.2 mm pitch) covering a total area of 57.4×57.4 mm2. The detector module was formed using a pixelated array of 40×40 lutetium-yttrium oxyorthosilicate (LYSO) scintillator crystal elements with 1.43 mm pitch. A 7 mm thick coupling light guide was used to allow light sharing between adjacent SiPM. A 16-channel symmetric charge division (SCD) readout board was designed to multiplex the number of signals from 64 to 16 (8 columns and 8 rows) and a center-of-gravity algorithm to identify the position. Data acquisition and digitization was accomplished using a custom-made system based on FPGAs boards. Crystal maps were obtained using 18F-positron sources and Voronoi diagrams were used to correct for geometric distortions and to generate a non-uniformity correction matrix. All measurements were taken at a controlled room temperature of 22oC. The crystal maps showed minor distortion, 90% of the 1600 total crystal elements could be identified, a mean peak-to-valley ratio of 4.3 was obtained and a 10.8% mean energy resolution for 511 keV annihilation photons was determined. The performance of the detector using our own readout board was compared to that using two different commercially readout boards using the same detector module arrangement. We show that these large-area SiPM arrays, combined with a 16-channel SCD readout board, can offer high spatial resolution, excellent energy resolution and detector uniformity and thus, can be used for positron emission imaging applications.
Primary Subject
Source
Available from http://dx.doi.org/10.1088/1748-0221/13/03/C03008; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Journal of Instrumentation; ISSN 1748-0221;
; v. 13(03); p. C03008

Country of publication
ALGORITHMS, ANNIHILATION, COMPARATIVE EVALUATIONS, CRYSTALS, DATA ACQUISITION, EMISSION, ENERGY RESOLUTION, FLUORINE 18, LUTETIUM ADDITIONS, PHOSPHORS, PHOTOMULTIPLIERS, POSITRON SOURCES, POSITRONS, READOUT SYSTEMS, SI SEMICONDUCTOR DETECTORS, SOLIDS, SPATIAL RESOLUTION, SYMMETRY, VISIBLE RADIATION, YTTRIUM ADDITIONS
ALLOYS, ANTILEPTONS, ANTIMATTER, ANTIPARTICLES, BETA DECAY RADIOISOTOPES, BETA-PLUS DECAY RADIOISOTOPES, DATA PROCESSING, ELECTROMAGNETIC RADIATION, ELEMENTARY PARTICLES, EVALUATION, FERMIONS, FLUORINE ISOTOPES, HOURS LIVING RADIOISOTOPES, INTERACTIONS, ISOMERIC TRANSITION ISOTOPES, ISOTOPES, LEPTONS, LIGHT NUCLEI, LUTETIUM ALLOYS, MATHEMATICAL LOGIC, MATTER, MEASURING INSTRUMENTS, NANOSECONDS LIVING RADIOISOTOPES, NUCLEI, ODD-ODD NUCLEI, PARTICLE INTERACTIONS, PARTICLE SOURCES, PHOTOTUBES, PROCESSING, RADIATION DETECTORS, RADIATION SOURCES, RADIATIONS, RADIOISOTOPES, RARE EARTH ADDITIONS, RARE EARTH ALLOYS, RESOLUTION, SEMICONDUCTOR DETECTORS
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