The effect of beam hardening on resolution in x-ray microtomography

Elke Van de Casteele; Dirk Van Dyck; Jan Sijbers; Erik Raman

doi:10.1117/12.535263

12 May 2004 The effect of beam hardening on resolution in x-ray microtomography

Elke Van de Casteele, Dirk Van Dyck, Jan Sijbers, Erik Raman

Proceedings Volume 5370, Medical Imaging 2004: Image Processing; (2004) https://doi.org/10.1117/12.535263
Event: Medical Imaging 2004, 2004, San Diego, California, United States

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.

Citation Download Citation

Elke Van de Casteele, Dirk Van Dyck, Jan Sijbers, and Erik Raman "The effect of beam hardening on resolution in x-ray microtomography", Proc. SPIE 5370, Medical Imaging 2004: Image Processing, (12 May 2004); https://doi.org/10.1117/12.535263

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