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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Editor: Stephen A. Burns
  • Vol. 23, Iss. 5 — May. 1, 2006
  • pp: 1048–1057

Automated determination of the center of rotation in tomography data

Tilman Donath, Felix Beckmann, and Andreas Schreyer  »View Author Affiliations

JOSA A, Vol. 23, Issue 5, pp. 1048-1057 (2006)

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Tomographic reconstruction requires precise knowledge of the position of the center of rotation in the sinogram data; otherwise, artifacts are introduced into the reconstruction. In parallel-beam microtomography, where resolution in the 1 μ m range is reached, the center of rotation is often only known with insufficient accuracy. We present three image metrics for the scoring of tomographic reconstructions and an iterative procedure for the determination of the position of the optimum center of rotation. The metrics are applied to model systems as well as to microtomography data from a synchrotron radiation source. The center of rotation is determined using the image metrics and compared with the results obtained by the center-of-mass method and by image registration. It is found that the image metrics make it possible to determine the axis position reliably at well below the resolution of one detector bin in an automated procedure.

© 2006 Optical Society of America

OCIS Codes
(000.3860) General : Mathematical methods in physics
(100.6950) Image processing : Tomographic image processing
(110.6960) Imaging systems : Tomography

ToC Category:
Imaging Systems

Original Manuscript: July 22, 2005
Manuscript Accepted: September 23, 2005

Tilman Donath, Felix Beckmann, and Andreas Schreyer, "Automated determination of the center of rotation in tomography data," J. Opt. Soc. Am. A 23, 1048-1057 (2006)

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