Segmentation-free statistical image reconstruction for polyenergetic X-ray computed tomography

  • Elbakri I
  • Fessier J
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Abstract

© 2002 IEEE. This paper describes a statistical iterative reconstruction method for X-ray CT based on a physical model that accounts for the polyenergetic X-ray source spectrum and the measurement nonlinearities caused by energy-dependent attenuation. The algorithm accommodates mixtures of tissues with known mass attenuation coefficients but unknown densities. We formulate a penalized-likelihood approach for this polyenergetic model based on Poisson statistics.

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Authors

  • I.A. Elbakri

  • J.A. Fessier

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