Upgrade for the Hyperion Detector Platform: Calibration Methods for the TOFPET ASIC

Abstract

The TOFPET ASIC from PETsys Electronics is a promising candidate to use for SiPM signal digitization in PET systems. Our group is currently integrating the ASIC in the MRI-compatible Hyperion PET detector platform. During this process, the calibration of the ASIC’s time- and charge-to-digital converters to register the timestamp and energy of an SiPM signal have to be considered both in firmware and in software routines. We present the calibration process we will use in our systems and compare to the PETsys-provided routines used in their hard-, firm-, and software. The TDC calibration method we propose uses randomly generated triggers. We could show that the method is reliable and even produces slightly better timing accuracy compared to the vendor provided method and does not rely on generating test pulses with specific phase shifts relative to the clock edge of the reference signal.

Authors 10

1. David Schug Aachen Institute for Experimental Molecular Imaging Department of Physics of Molecular Imaging Systems

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University,Institute for Experimental Molecular Imaging,Department of Physics of Molecular Imaging Systems,Aachen,North Rhine-Westphalia,Germany

2. Vanessa Nadig Aachen Institute for Experimental Molecular Imaging Department of Physics of Molecular Imaging Systems

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University,Institute for Experimental Molecular Imaging,Department of Physics of Molecular Imaging Systems,Aachen,North Rhine-Westphalia,Germany

3. Bjoern Weissler Aachen Institute for Experimental Molecular Imaging Department of Physics of Molecular Imaging Systems

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University,Institute for Experimental Molecular Imaging,Department of Physics of Molecular Imaging Systems,Aachen,North Rhine-Westphalia,Germany

4. Yannick Kuhl Aachen Institute for Experimental Molecular Imaging Department of Physics of Molecular Imaging Systems

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University,Institute for Experimental Molecular Imaging,Department of Physics of Molecular Imaging Systems,Aachen,North Rhine-Westphalia,Germany

5. Harald Radermacher Aachen Institute for Experimental Molecular Imaging Department of Physics of Molecular Imaging Systems

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University,Institute for Experimental Molecular Imaging,Department of Physics of Molecular Imaging Systems,Aachen,North Rhine-Westphalia,Germany

6. Stephan Naunheim Aachen Institute for Experimental Molecular Imaging Department of Physics of Molecular Imaging Systems

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University,Institute for Experimental Molecular Imaging,Department of Physics of Molecular Imaging Systems,Aachen,North Rhine-Westphalia,Germany

7. S. Gundacker Aachen Institute for Experimental Molecular Imaging Department of Physics of Molecular Imaging Systems

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University,Institute for Experimental Molecular Imaging,Department of Physics of Molecular Imaging Systems,Aachen,North Rhine-Westphalia,Germany

8. O. Muelhens
   Affiliation as printed

   Hyperion Hybrid Imaging Systems GmbH,Aachen,North Rhine-Westphalia,Germany

9. E. Gegenmantel
   Affiliation as printed

   Hyperion Hybrid Imaging Systems GmbH,Aachen,North Rhine-Westphalia,Germany

10. Volkmar Schulz Aachen Institute for Experimental Molecular Imaging Department of Physics of Molecular Imaging Systems

    RWTH Aachen University

    Affiliation as printed

    RWTH Aachen University,Institute for Experimental Molecular Imaging,Department of Physics of Molecular Imaging Systems,Aachen,North Rhine-Westphalia,Germany