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Proceedings Paper

Impact of Compton scatter on material decomposition using a photon counting spectral detector
Author(s): Cale Lewis; Chan-Soo Park; Nathaniel R. Fredette; Mini Das
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Paper Abstract

Photon counting spectral detectors are being investigated to allow better discrimination of multiple materials by collecting spectral data for every detector pixel. The process of material decomposition or discrimination starts with an accurate estimation of energy dependent attenuation of the composite object. Photoelectric effect and Compton scattering are two important constituents of the attenuation. Compton scattering while results in a loss of primary photon, also results in an increase in photon counts in the lower ene1rgy bins via multiple orders of scatter. This contribution to each energy bin may change with material properties, thickness and x-ray energies. There has been little investigation into the effect of this increase in counts at lower energies due to presence of these Compton scattered photons using photon counting detectors. Our investigations show that it is important to account for this effect in spectral decomposition problems.

Paper Details

Date Published: 9 March 2017
PDF: 6 pages
Proc. SPIE 10132, Medical Imaging 2017: Physics of Medical Imaging, 101323T (9 March 2017); doi: 10.1117/12.2256106
Show Author Affiliations
Cale Lewis, Univ. of Houston (United States)
Chan-Soo Park, Univ. of Houston (United States)
Nathaniel R. Fredette, Univ. of Houston (United States)
Mini Das, Univ. of Houston (United States)


Published in SPIE Proceedings Vol. 10132:
Medical Imaging 2017: Physics of Medical Imaging
Thomas G. Flohr; Joseph Y. Lo; Taly Gilat Schmidt, Editor(s)

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