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Postprocessing method for reducing phase effects in reconstructed microcomputed-tomography data
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Visual Information and Interaction. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Computerized Image Analysis and Human-Computer Interaction.
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2013 (English)In: Optical Society of America. Journal A: Optics, Image Science, and Vision, ISSN 1084-7529, E-ISSN 1520-8532, Vol. 30, no 3, 455-461 p.Article in journal (Refereed) Published
Abstract [en]

With increased resolution in x-ray computed tomography, refraction adds increasingly to the attenuation signal. Though potentially beneficial, the artifacts caused by refraction often need to be removed from the image. In this paper, we propose a postprocessing method, based on deconvolution, that is able to remove these artifacts after conventional reconstruction. This method poses two advantages over existing projection-based (preprocessing) phase-retrieval or phase-removal algorithms. First, evaluation of the parameters can be done very quickly, improving the overall speed of the method. Second, postprocessing methods can be applied when projection data is not available, which occurs in several commercial systems with closed software or when projection data has been deleted. It is shown that the proposed method performs comparably to state-of-the-art methods in terms of image quality.

Place, publisher, year, edition, pages
2013. Vol. 30, no 3, 455-461 p.
National Category
Medical Image Processing
Identifiers
URN: urn:nbn:se:uu:diva-198398ISI: 000316099600018OAI: oai:DiVA.org:uu-198398DiVA: diva2:616098
Available from: 2013-04-15 Created: 2013-04-15 Last updated: 2017-12-06Bibliographically approved

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Wernersson, Erik L. G.Luengo Hendriks, Cris L.

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Optical Society of America. Journal A: Optics, Image Science, and Vision
Medical Image Processing

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