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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 7, Iss. 11 — Oct. 31, 2012

A reconstruction method for cone-beam differential x-ray phase-contrast computed tomography

Jian Fu, Astrid Velroyen, Renbo Tan, Junwei Zhang, Liyuan Chen, Arne Tapfer, Martin Bech, and Franz Pfeiffer  »View Author Affiliations

Optics Express, Vol. 20, Issue 19, pp. 21512-21519 (2012)

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Most existing differential phase-contrast computed tomography (DPC-CT) approaches are based on three kinds of scanning geometries, described by parallel-beam, fan-beam and cone-beam. Due to the potential of compact imaging systems with magnified spatial resolution, cone-beam DPC-CT has attracted significant interest. In this paper, we report a reconstruction method based on a back-projection filtration (BPF) algorithm for cone-beam DPC-CT. Due to the differential nature of phase contrast projections, the algorithm restrains from differentiation of the projection data prior to back-projection, unlike BPF algorithms commonly used for absorption-based CT data. This work comprises a numerical study of the algorithm and its experimental verification using a dataset measured with a three-grating interferometer and a micro-focus x-ray tube source. Moreover, the numerical simulation and experimental results demonstrate that the proposed method can deal with several classes of truncated cone-beam datasets. We believe that this feature is of particular interest for future medical cone-beam phase-contrast CT imaging applications.

© 2012 OSA

OCIS Codes
(110.7440) Imaging systems : X-ray imaging
(110.3175) Imaging systems : Interferometric imaging
(110.6955) Imaging systems : Tomographic imaging

ToC Category:
Imaging Systems

Original Manuscript: June 13, 2012
Manuscript Accepted: August 12, 2012
Published: September 5, 2012

Virtual Issues
Vol. 7, Iss. 11 Virtual Journal for Biomedical Optics

Jian Fu, Astrid Velroyen, Renbo Tan, Junwei Zhang, Liyuan Chen, Arne Tapfer, Martin Bech, and Franz Pfeiffer, "A reconstruction method for cone-beam differential x-ray phase-contrast computed tomography," Opt. Express 20, 21512-21519 (2012)

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