X-ray photon-counting using silicon photomultiplier-based scintillation detectors at high x-ray tube currents

Stefan van der Sar; Stefan Brunner; Dennis Schaart

doi:10.1117/12.2611365

4 April 2022 X-ray photon-counting using silicon photomultiplier-based scintillation detectors at high x-ray tube currents

Stefan van der Sar, Stefan Brunner, Dennis Schaart

Author Affiliations +

Proceedings Volume 12031, Medical Imaging 2022: Physics of Medical Imaging; 120310I (2022) https://doi.org/10.1117/12.2611365
Event: SPIE Medical Imaging, 2022, San Diego, California, United States

Abstract

We investigate X-ray photon-counting scintillation detectors with silicon photomultiplier (SiPM) readout. These circumvent some drawbacks of direct-conversion detectors. We measured observed count rate (OCR) versus X-ray tube current for single-pixel detectors consisting of LYSO:Ce and YAP:Ce scintillators coupled to ultrafast SiPMs. For a 30 keV threshold, the maximum OCRs equal 4.5 Mcps/pixel (LYSO:Ce) and 5.5 Mcps/pixel (YAP:Ce) for paralyzable-like counting and 10 Mcps/pixel (LYSO:Ce) and 12.5 Mcps/pixel (YAP:Ce) for nonparalyzable-like counting. We estimate that the twice as fast LaBr3:Ce scintillator yields OCRs approaching those of CdTe/CZT-based photon-counting CT detectors. We also show energy response data and discuss dose-efficient pixel miniaturization.

Conference Presentation

Citation Download Citation

Stefan van der Sar, Stefan Brunner, and Dennis Schaart "X-ray photon-counting using silicon photomultiplier-based scintillation detectors at high x-ray tube currents", Proc. SPIE 12031, Medical Imaging 2022: Physics of Medical Imaging, 120310I (4 April 2022); https://doi.org/10.1117/12.2611365

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