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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 10 — May. 10, 2010
  • pp: 10404–10422

Image reconstruction exploiting object sparsity in boundary-enhanced X-ray phase-contrast tomography

Emil Y. Sidky, Mark A. Anastasio, and Xiaochuan Pan  »View Author Affiliations


Optics Express, Vol. 18, Issue 10, pp. 10404-10422 (2010)
http://dx.doi.org/10.1364/OE.18.010404


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Abstract

Propagation-based X-ray phase-contrast tomography (PCT) seeks to reconstruct information regarding the complex-valued refractive index distribution of an object. In many applications, a boundary-enhanced image is sought that reveals the locations of discontinuities in the real-valued component of the refractive index distribution. We investigate two iterative algorithms for few-view image reconstruction in boundary-enhanced PCT that exploit the fact that a boundary-enhanced PCT image, or its gradient, is often sparse. In order to exploit object sparseness, the reconstruction algorithms seek to minimize the ℓ1-norm or TV-norm of the image, subject to data consistency constraints. We demonstrate that the algorithms can reconstruct accurate boundary-enhanced images from highly incomplete few-view projection data.

© 2010 Optical Society of America

OCIS Codes
(100.3190) Image processing : Inverse problems
(110.3010) Imaging systems : Image reconstruction techniques

ToC Category:
Image Processing

History
Original Manuscript: October 26, 2009
Revised Manuscript: December 30, 2009
Manuscript Accepted: January 12, 2010
Published: May 5, 2010

Virtual Issues
Vol. 5, Iss. 9 Virtual Journal for Biomedical Optics

Citation
Emil Y. Sidky, Mark A. Anastasio, and Xiaochuan Pan, "Image reconstruction exploiting object sparsity in boundary-enhanced X-ray phase-contrast tomography," Opt. Express 18, 10404-10422 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-10-10404


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