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Studies of the high rate coincidence timing response of the STiC and TOFPET ASICs for the SAFIR PET scanner

Becker, R. and Casella, C. and Corrodi, S. and Dissertori, G. and Fischer, J. and Howard, A. and Ito, M. and Lustermann, W. (2016) Studies of the high rate coincidence timing response of the STiC and TOFPET ASICs for the SAFIR PET scanner. Journal of Instrumentation, 11 (12). Art. No. P12001. ISSN 1748-0221.

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The proposed SAFIR PET detector will measure positron electron annihilations at injected activities up to 500 MBq in a mouse or rat. The system is required to have the best possible timing resolution in order to remove accidental coincidences (randoms) and maximise the image quality for short time frames allowing the possibility of 4-D kinetic modelling of simultaneous PET and MRI for the first time. Two different ASICs, TOFPET and STiC, have been investigated with LYSO crystal scintillators coupled to SiPM detectors and using ^(18)F sources up to 480 MBq. Timing responses are very encouraging with a coincidence time resolution of ~100 ps measured at low activities, degrading to 130 ps at the foreseen scanner maximum event rate. Sensitivities for single event rates and coincidences are measured and compared with Geant4 Monte Carlo simulations.

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Fischer, J.0000-0001-6697-7808
Additional Information:© 2017 IOP Publishing. Received 3 October 2016; Accepted 13 November 2016; Published 1 December 2016.
Issue or Number:12
Record Number:CaltechAUTHORS:20170621-073803820
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Official Citation:R. Becker et al 2016 JINST 11 P12001
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:78396
Deposited By: Tony Diaz
Deposited On:21 Jun 2017 17:57
Last Modified:09 Mar 2020 13:18

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