Time of flight measurements based on FPGA and SiPMs for PET MR
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https://riunet.upv.es/handle/10251/79497
Cita bibliográfica
Aguilar, A.; Garcia-Olcina, R.; Martinez, PA.; Martos, J.; Soret, J.; Torres-Pais, J.; Benlloch Baviera, JM.... (2014). Time of flight measurements based on FPGA and SiPMs for PET MR. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 734:127-131. doi:10.1016/j.nima.2013.09.008
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Resumen
Coincidence time measurements with SiPMs have shown to be suitable for PET/MR systems. The present study is based on 3 x 3 mm(2) 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. (C) 2013 Elsevier By, All rights reserved,
Fuente
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment issn: 0168-9002