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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 19 — Sep. 13, 2010
  • pp: 19681–19692

Source size and temporal coherence requirements of coded aperture type x-ray phase contrast imaging systems.

Peter R.T. Munro, Konstantin Ignatyev, Robert D. Speller, and Alessandro Olivo  »View Author Affiliations

Optics Express, Vol. 18, Issue 19, pp. 19681-19692 (2010)

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There is currently much interest in developing X-ray Phase Contrast Imaging (XPCI) systems which employ laboratory sources in order to deploy the technique in real world applications. The challenge faced by nearly all XPCI techniques is that of efficiently utilising the x-ray flux emitted by an x-ray tube which is polychromatic and possesses only partial spatial coherence. Techniques have, however, been developed which overcome these limitations. Such a technique, known as coded aperture XPCI, has been under development in our laboratories in recent years for application principally in medical imaging and security screening. In this paper we derive limitations imposed upon source polychromaticity and spatial extent by the coded aperture system. We also show that although other grating XPCI techniques employ a different physical principle, they satisfy design constraints similar to those of the coded aperture XPCI.

© 2010 Optical Society of America

OCIS Codes
(050.1960) Diffraction and gratings : Diffraction theory
(110.7440) Imaging systems : X-ray imaging
(120.5050) Instrumentation, measurement, and metrology : Phase measurement

ToC Category:
X-ray Optics

Original Manuscript: April 30, 2010
Revised Manuscript: July 27, 2010
Manuscript Accepted: July 29, 2010
Published: September 1, 2010

Virtual Issues
Vol. 5, Iss. 13 Virtual Journal for Biomedical Optics

Peter R. T. Munro, Konstantin Ignatyev, Robert D. Speller, and Alessandro Olivo, "Source size and temporal coherence requirements of coded aperture type x-ray phase contrast imaging systems," Opt. Express 18, 19681-19692 (2010)

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