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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 6, Iss. 6 — Jul. 7, 2011

Phase retrieval in quantitative x-ray microtomography with a single sample-to-detector distance

R. C. Chen, H. L. Xie, L. Rigon, R. Longo, E. Castelli, and T. Q. Xiao  »View Author Affiliations


Optics Letters, Vol. 36, Issue 9, pp. 1719-1721 (2011)
http://dx.doi.org/10.1364/OL.36.001719


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Abstract

Phase retrieval extracts quantitative phase information from x-ray propagation-based phase-contrast images. Notwithstanding inherent approximations, phase retrieval using a single sample-to-detector distance (SDD) is very attractive, because it imposes no setup complications or additional radiation dose compared to absorption-based imaging. Considering the phase-attenuation duality ( ε = δ / β , where ε is constant), a simple absorption correction factor is proposed for the modified Bronnikov algorithm in x-ray propagation-based phase-contrast computed tomography (PPCT). Moreover, a practical method for calculating the optimal ε value is proposed, which requires no prior knowledge of the sample. Tests performed on simulation and experimental data successfully distin guished different materials in a quasihomogeneous and weakly absorbing sample from a single SDD-PPCT data point.

© 2011 Optical Society of America

OCIS Codes
(100.5070) Image processing : Phase retrieval
(110.6960) Imaging systems : Tomography
(110.7440) Imaging systems : X-ray imaging

ToC Category:
Image Processing

History
Original Manuscript: January 19, 2011
Manuscript Accepted: March 26, 2011
Published: April 29, 2011

Virtual Issues
Vol. 6, Iss. 6 Virtual Journal for Biomedical Optics

Citation
R. C. Chen, H. L. Xie, L. Rigon, R. Longo, E. Castelli, and T. Q. Xiao, "Phase retrieval in quantitative x-ray microtomography with a single sample-to-detector distance," Opt. Lett. 36, 1719-1721 (2011)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ol-36-9-1719


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