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EJNMMI Physics
Fig. 2 | EJNMMI Physics

Fig. 2

From: NEMA NU 1-2018 performance characterization and Monte Carlo model validation of the Cubresa Spark SiPM-based preclinical SPECT scanner

Fig. 2

Digitizer signal processing model of the Spark’s readout electronics used in GATE. Interactions in the scintillation crystal were recorded as hits following Geant4 particle generation and transport through modelled materials. Hits were subsequently filtered through the digitizer modules to obtain singles corresponding to the detected signal after processing by the front-end electronics. Digitizer parameters were determined empirically from measurement by simulating a range of values for a given digitizer parameter, fitting a cubic spline to the simulated results, then interpolating the digitizer parameter at the measured result, except for the pile-up timing resolution which was calculated with Eq. 1

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