A multi-channel image reconstruction method for grating-based X-ray phase-contrast computed Tomography

Qiaofeng Xu, Alex Sawatzky, Mark A. Anastasio

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In This work, we report on The development of an advanced multi-channel (MC) image reconstruction algorithm for grating-based X-ray phase-contrast computed Tomography (GB-XPCT). The MC reconstruction method we have developed operates by concurrently, rather Than independently as is done conventionally, reconstructing Tomographic images of The Three object properties (absorption, small-Angle scattering, refractive index). By jointly estimating The object properties by use of an appropriately defined penalized weighted least squares (PWLS) estimator, The 2nd order statistical properties of The object property sinograms, including correlations between Them, can be fully exploited To improve The variance vs. resolution Tradeoff of The reconstructed images as compared To existing methods. Channel-independent regularization strategies are proposed. To solve The MC reconstruction problem, we developed an advanced algorithm based on The proximal point algorithm and The augmented Lagrangian method. By use of experimental and computer-simulation data, we demonstrate That by exploiting inter-channel noise correlations, The MC reconstruction method can improve image quality in GB-XPCT.

Original languageEnglish (US)
Title of host publicationMedical Imaging 2014
Subtitle of host publicationPhysics of Medical Imaging
PublisherSPIE
ISBN (Print)9780819498267
DOIs
StatePublished - Jan 1 2014
Externally publishedYes
EventMedical Imaging 2014: Physics of Medical Imaging - San Diego, CA, United States
Duration: Feb 17 2014Feb 20 2014

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume9033
ISSN (Print)1605-7422

Other

OtherMedical Imaging 2014: Physics of Medical Imaging
CountryUnited States
CitySan Diego, CA
Period2/17/142/20/14

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Radiology Nuclear Medicine and imaging

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  • Cite this

    Xu, Q., Sawatzky, A., & Anastasio, M. A. (2014). A multi-channel image reconstruction method for grating-based X-ray phase-contrast computed Tomography. In Medical Imaging 2014: Physics of Medical Imaging [90330D] (Progress in Biomedical Optics and Imaging - Proceedings of SPIE; Vol. 9033). SPIE. https://doi.org/10.1117/12.2043732