Speaker
David Schug
(Department of Physics of Molecular Imaging Systems, Institute for Experimental Molecular Imaging, RWTH Aachen University, Aachen, Germany)
Description
We present results obtained with the PETsys TOFPET2 ASIC Evaluation Kit.
The TOFPET2 ASIC is a time-of-flight capable 64-channel ASIC and is a promising candidate to build high-performance TOF-PET systems.
For a first characterization, we used two KETEK-PM3325-WB SiPMs each equipped with a 3x3x5 mm³ LYSO scintillation crystal.
For the measurements presented in this work, we changed the discriminator threshold t1 = 5 - 30 in steps of 5 and the bias voltage V_bias = 29 V - 35 V in steps of 0.25 V and acquired data during 60 s.
For all measurements, we performed an energy calibration including a correction for saturation.
We evaluated the energy resolution, the coincidence resolving time (CRT) and the coincidence rate.
At the optimal operating point, we obtained an energy resolution of about 9-7% FWHM, a CRT of approximately 210 ps FWHM and 395 ps FWTM, the coincidence rate showed only small variations of about 5% in the evaluated parameter range.
Primary author
David Schug
(Department of Physics of Molecular Imaging Systems, Institute for Experimental Molecular Imaging, RWTH Aachen University, Aachen, Germany)
Co-authors
Dr
Bjoern Weissler
(Department of Physics of Molecular Imaging Systems, Institute for Experimental Molecular Imaging, RWTH Aachen University, Aachen, Germany)
Dr
Pierre Gebhardt
(Department of Physics of Molecular Imaging Systems, Institute for Experimental Molecular Imaging, RWTH Aachen University, Aachen, Germany)
Prof.
Volkmar Schulz
(Department of Physics of Molecular Imaging Systems, Institute for Experimental Molecular Imaging, RWTH Aachen University, Aachen, Germany)
