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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 7, Iss. 2 — Feb. 1, 2012

A tilted grating interferometer for full vector field differential x-ray phase contrast tomography

Simon Rutishauser, Tilman Donath, Christian David, Franz Pfeiffer, Federica Marone, Peter Modregger, and Marco Stampanoni  »View Author Affiliations

Optics Express, Vol. 19, Issue 25, pp. 24890-24896 (2011)

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We report on a setup for differential x-ray phase-contrast imaging and tomography, that measures the full 2D phase-gradient information. The setup uses a simple one-dimensional x-ray grating interferometer, in which the grating structures of the interferometer are oriented at a tilt angle with respect to the sample rotation axis. In such a configuration, the differential phase images from opposing tomography projections can be combined to yield both components of the gradient vector. We show how the refractive index distribution as well as its x, y, and z gradient components can be reconstructed directly from the recorded projection data. The method can equally well be applied at conventional x-ray tube sources, to analyzer based x-ray imaging or neutron imaging. It is demonstrated with measurements of an x-ray phantom and a rat brain using synchrotron radiation.

© 2011 OSA

OCIS Codes
(110.7440) Imaging systems : X-ray imaging
(340.7450) X-ray optics : X-ray interferometry
(110.3175) Imaging systems : Interferometric imaging
(110.6955) Imaging systems : Tomographic imaging

ToC Category:
X-ray Optics

Original Manuscript: September 19, 2011
Revised Manuscript: October 28, 2011
Manuscript Accepted: November 2, 2011
Published: November 22, 2011

Virtual Issues
Vol. 7, Iss. 2 Virtual Journal for Biomedical Optics

Simon Rutishauser, Tilman Donath, Christian David, Franz Pfeiffer, Federica Marone, Peter Modregger, and Marco Stampanoni, "A tilted grating interferometer for full vector field differential x-ray phase contrast tomography," Opt. Express 19, 24890-24896 (2011)

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