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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 19, Iss. 3 — Mar. 1, 2002
  • pp: 472–480

Theory of quantitative phase-contrast computed tomography

Andrei V. Bronnikov  »View Author Affiliations


JOSA A, Vol. 19, Issue 3, pp. 472-480 (2002)
http://dx.doi.org/10.1364/JOSAA.19.000472


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Abstract

Phase-contrast x-ray computed tomography (CT) is an emerging imaging technique that can be implemented at third-generation synchrotron radiation sources or by using a microfocus x-ray source. Promising results have recently been obtained in materials science and medicine. At the same time, the lack of a mathematical theory comparable with that of conventional CT limits the progress in this field. Such a theory is now suggested, establishing a fundamental relation between the three-dimensional Radon transform of the object function and the two-dimensional Radon transform of the phase-contrast projection. A reconstruction algorithm is derived in the form of a filtered backprojection. The filter function is given in the space and spatial-frequency domains. The theory suggested enables one to quantitatively determine the refractive index of a weakly absorbing medium from x-ray intensity data measured in the near-field region. The results of computer simulations are discussed.

© 2002 Optical Society of America

OCIS Codes
(100.3010) Image processing : Image reconstruction techniques
(110.6960) Imaging systems : Tomography

History
Original Manuscript: April 23, 2001
Revised Manuscript: July 24, 2001
Manuscript Accepted: July 25, 2001
Published: March 1, 2002

Citation
Andrei V. Bronnikov, "Theory of quantitative phase-contrast computed tomography," J. Opt. Soc. Am. A 19, 472-480 (2002)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-19-3-472

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