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Article

Investigation of GaGG:Ce with TOFPET2 ASIC Readout for Applications in Gamma Imaging Systems

1
Department of Physics, Faculty of Science, University of Zagreb, Bijenička c. 32, 10000 Zagreb, Croatia
2
Institute for Medical Research and Occupational Health, Ksaverska cesta 2, 10000 Zagreb, Croatia
*
Author to whom correspondence should be addressed.
Crystals 2020, 10(12), 1073; https://doi.org/10.3390/cryst10121073
Received: 30 September 2020 / Revised: 10 November 2020 / Accepted: 22 November 2020 / Published: 25 November 2020
(This article belongs to the Special Issue Scintillators for Medical Imaging Applications)
We investigated two detector modules, each consisting of a 8 × 8 matrix of GaGG:Ce crystals with a crystal size of 3 × 3 × 20 mm3 and a 3.2 mm pitch. The light is collected by a 8 × 8 silicon photomultiplier array, with one silicon photomultiplier matching one crystal. The signals are read out and processed using the TOFPET2 ASIC. Performed laboratory tests of the detectors were performed using a 22Na source, where energy and coincidence time resolution with different optical coupling were examined between the crystals and silicon photomultipliers, as well as under various operating voltages. The mean energy resolution of 9.8±0.6% at 511 keV was observed and it was shown that the coincidence time resolution of 384±33 ps could be achieved. The results reassure that the GaGG scintillator is a very promising candidate for the development of imaging systems, in particular, ones utilizing Compton scattering where the energy resolution plays a critical role and a moderate timing performance is acceptable. View Full-Text
Keywords: GaGG; silicon photomultiplier; positron emission tomography; compton imaging; gamma polarization; TOFPET2 GaGG; silicon photomultiplier; positron emission tomography; compton imaging; gamma polarization; TOFPET2
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MDPI and ACS Style

Makek, M.; Bosnar, D.; Kožuljević, A.M.; Pavelić, L. Investigation of GaGG:Ce with TOFPET2 ASIC Readout for Applications in Gamma Imaging Systems. Crystals 2020, 10, 1073. https://doi.org/10.3390/cryst10121073

AMA Style

Makek M, Bosnar D, Kožuljević AM, Pavelić L. Investigation of GaGG:Ce with TOFPET2 ASIC Readout for Applications in Gamma Imaging Systems. Crystals. 2020; 10(12):1073. https://doi.org/10.3390/cryst10121073

Chicago/Turabian Style

Makek, Mihael, Damir Bosnar, Ana M. Kožuljević, and Luka Pavelić. 2020. "Investigation of GaGG:Ce with TOFPET2 ASIC Readout for Applications in Gamma Imaging Systems" Crystals 10, no. 12: 1073. https://doi.org/10.3390/cryst10121073

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