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Research article - Peer-reviewed, 2013

Postprocessing method for reducing phase effects in reconstructed microcomputed-tomography data

Wernersson, Erik; Boone, Matthieu N.; Van den Bulcke, Jan; Van Hoorebeke, Luc; Luengo, Cris


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. (C) 2013 Optical Society of America

Published in

Journal of the Optical Society of America A
2013, Volume: 30, number: 3, pages: 455-461

    SLU Authors

    • Wernersson, Erik

      • Centre for Image Analysis, Swedish University of Agricultural Sciences
      • Luengo, Cris

        • Centre for Image Analysis, Swedish University of Agricultural Sciences

      UKÄ Subject classification

      Radiology, Nuclear Medicine and Medical Imaging
      Medical Image Processing
      Computer Vision and Robotics (Autonomous Systems)

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