An analytical model of the effects of pulse pileup on the energy spectrum recorded by energy resolved photon counting x-ray detectors

Katsuyuki Taguchi; Eric C. Frey; Xiaolan Wang; Jan S. Iwanczyk; William C. Barber

doi:10.1117/12.843753

18 March 2010 An analytical model of the effects of pulse pileup on the energy spectrum recorded by energy resolved photon counting x-ray detectors

Katsuyuki Taguchi, Eric C. Frey, Xiaolan Wang, Jan S. Iwanczyk, William C. Barber

Author Affiliations +

Proceedings Volume 7622, Medical Imaging 2010: Physics of Medical Imaging; 76221C (2010) https://doi.org/10.1117/12.843753
Event: SPIE Medical Imaging, 2010, San Diego, California, United States

Abstract

Recently, a novel CdTe photon counting x-ray detector (PCXD) with energy discrimination capabilities has been developed [1, 2]. When such detectors are operated under a high count rate, however, coincident pulses and tails of pulses distort the recorded energy spectrum. These distortions are called pulse pileup effects. It is essential to compensate for these effects on the recorded energy spectrum in order to take a full advantage of spectral information PCXDs provide. In this study, we have developed a new analytical pulse pileup model which uses a model of the measured pulse shape measured for a PCXD [1, 2]. We validated the model using Monte Carlo simulations of monochromatic and polychromatic spectra compared to predictions from our model. Excellent agreement was found between the recorded spectra obtained by the MC simulations and those calculated by our analytical model.

Citation Download Citation

Katsuyuki Taguchi, Eric C. Frey, Xiaolan Wang, Jan S. Iwanczyk, and William C. Barber "An analytical model of the effects of pulse pileup on the energy spectrum recorded by energy resolved photon counting x-ray detectors", Proc. SPIE 7622, Medical Imaging 2010: Physics of Medical Imaging, 76221C (18 March 2010); https://doi.org/10.1117/12.843753

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