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Proceedings Paper

The effect of beam hardening on resolution in x-ray microtomography
Author(s): Elke Van de Casteele; Dirk Van Dyck; Jan Sijbers; Erik Raman
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Paper Abstract

Spatial resolution describes the ability to distinguish adjacent objects. It is often used as a measure of the quality of an image. By studying the edge of a cylindrical object a value for the spatial resolution is obtained. However, as a consequence of the polychromatic source used in micro-CT, beam hardening will occur which has the effect of enhancing the edges of the objects in the reconstruction images. These artefacts will have an influence on the resolution measure. In this paper, the spatial resolution in the reconstruction images is determined with and without beam hardening correction. In addition, the effect of the geometric magnification and the dependence on the type of sample material is studied.

Paper Details

Date Published: 12 May 2004
PDF: 8 pages
Proc. SPIE 5370, Medical Imaging 2004: Image Processing, (12 May 2004); doi: 10.1117/12.535263
Show Author Affiliations
Elke Van de Casteele, Univ. of Antwerp (Belgium)
Dirk Van Dyck, Univ. of Antwerp (Belgium)
Jan Sijbers, Univ. of Antwerp (Belgium)
Erik Raman, Univ. of Antwerp (Belgium)

Published in SPIE Proceedings Vol. 5370:
Medical Imaging 2004: Image Processing
J. Michael Fitzpatrick; Milan Sonka, Editor(s)

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