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Time of flight measurements based on FPGA and SiPMs for PET–MR

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  • Authors: A. Aguilar, R. García-Olcina, P. A. Martínez, J. Martos, J. Soret, J. Torres, J.M. Benlloch, A.J. González, F. Sánchez
    • (2014).
  • Publication types: Article
  • URL Publication: Time of flight measurements based on FPGA and SiPMs for PET–MR
  • Publication Title (name of the book or magazine): Nuclear Inst. and Methods in Physics Research, A..
    • No.734

  • Abstract:

    Coincidence time measurements with SiPMs have shown to be suitable for PET/MR systems. The present study is based on 3×3 mm2 SiPMs, LSO crystals and a conditioning signal electronic circuit. A Constant Fraction Discriminator (CFD) is used to digitalize the signals and a TDC FPGA-implemented is employed for fine time measurements. TDC capability allows processing the arrival of multiple events simultaneously, measuring times under 100 ps. The complete set-up for time measurements results on a resolution of 892±41 ps for a pair of detectors. The details of such implementation are exposed and the trade-offs of each configuration are discussed.

    • DOI: 10.1016/j.nima.2013.09.008
    ISSN: 0168-9002