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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 22 — Nov. 4, 2013
  • pp: 25677–25684

Grating-based x-ray phase-contrast imaging with a multi energy-channel photon-counting pixel detector

Georg Pelzer, Thomas Weber, Gisela Anton, Rafael Ballabriga, Florian Bayer, Michael Campbell, Thomas Gabor, Wilhelm Haas, Florian Horn, Xavi Llopart, Norbert Michel, Uwe Mollenbauer, Jens Rieger, André Ritter, Ina Ritter, Peter Sievers, Stefan Wölfel, Winnie S. Wong, Andrea Zang, and Thilo Michel  »View Author Affiliations


Optics Express, Vol. 21, Issue 22, pp. 25677-25684 (2013)
http://dx.doi.org/10.1364/OE.21.025677


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Abstract

We have carried out grating-based x-ray differential phase-contrast measurements with a hybrid pixel detector in 16 energy channels simultaneously. A method for combining the energy resolved phase-contrast images based on energy weighting is presented. An improvement in contrast-to-noise ratio by 58.2% with respect to an emulated integrating detector could be observed in the final image. The same image quality could thus be achieved with this detector and with energy weighting at 60.0% reduced dose compared to an integrating detector. The benefit of the method depends on the object, spectrum, interferometer design and the detector efficiency.

© 2013 Optical Society of America

OCIS Codes
(040.7480) Detectors : X-rays, soft x-rays, extreme ultraviolet (EUV)
(100.5070) Image processing : Phase retrieval
(110.7440) Imaging systems : X-ray imaging
(340.7450) X-ray optics : X-ray interferometry
(110.3175) Imaging systems : Interferometric imaging

ToC Category:
Imaging Systems

History
Original Manuscript: July 22, 2013
Revised Manuscript: September 6, 2013
Manuscript Accepted: September 13, 2013
Published: October 21, 2013

Virtual Issues
Vol. 9, Iss. 1 Virtual Journal for Biomedical Optics

Citation
Georg Pelzer, Thomas Weber, Gisela Anton, Rafael Ballabriga, Florian Bayer, Michael Campbell, Thomas Gabor, Wilhelm Haas, Florian Horn, Xavi Llopart, Norbert Michel, Uwe Mollenbauer, Jens Rieger, André Ritter, Ina Ritter, Peter Sievers, Stefan Wölfel, Winnie S. Wong, Andrea Zang, and Thilo Michel, "Grating-based x-ray phase-contrast imaging with a multi energy-channel photon-counting pixel detector," Opt. Express 21, 25677-25684 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-22-25677


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