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

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

van der Sar, S.J. (TU Delft RST/Medical Physics & Technology)
Brunner, Stefan (Broadcom Inc., Regensburg)
Schaart, D.R. (TU Delft RST/Medical Physics & Technology; Holland Particle Therapy Centre)

2022

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.

count rate performance
energy response
scintillator
silicon photomultiplier (SiPM)
X-ray photon-counting

http://resolver.tudelft.nl/uuid:98a84d24-a13a-47b4-95ba-803ffd3cb916

https://doi.org/10.1117/12.2611365

2022-10-04

1605-7422

Progress in Biomedical Optics and Imaging, 12031

Medical Imaging 2022: Physics of Medical Imaging, 2022-03-21 → 2022-03-27, Virtual, Online

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

journal article

© 2022 S.J. van der Sar, Stefan Brunner, D.R. Schaart