Tomography is an imaging technique that combines projections taken from different directions into a reconstruction of the interior of a patient or an object. The ASTRA research group (“All Scales Tomographic Reconstruction Antwerp”) of imec-Vision Lab develops tomographic reconstruction algorithms for electron, X-ray, neutron, and magnetic resonance imaging. The ASTRA group developed the ASTRA-Toolbox, which is an open source, GPU accelerated software platform for the development of novel tomographic reconstruction methods; it can be downloaded from

Key expertises:

  • Discrete tomography
  • X-ray tomography for non-standard acquisition geometries
  • Electron tomography
  • Dynamic (4D) tomography

Journal publications


Z. Mai, T. Huysmans, and J. Sijbers, "Colon Visualization Using Cylindrical Parameterization", Lecture Notes in Computer Science, vol. 4678, pp. 607-615, 2007. Full text (1.44 MB)


E. Van de Casteele, D. Van Dyck, J. Sijbers, and E. Raman, "A model-based correction method for beam hardening artefacts in X-ray microtomography", Journal of X-ray science and technology, vol. 12, no. 1, pp. 53-57, 2004. Download full paper (581.05 KB)
J. Sijbers, and A. Postnov, "Reduction of ring artifacts in high resolution micro-CT reconstructions", Physics in Medicine and Biology, vol. 49, no. 14, pp. 247-253, 2004.


E. Van de Casteele, D. Van Dyck, J. Sijbers, and E. Raman, "An energy-based beam hardening model in tomography", Physics in Medicine and Biology, vol. 47, no. 23, pp. 4181-4190, 2002. Download full paper (203.21 KB)