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


G. Van Gompel, "Towards accurate image reconstruction from truncated X-ray CT projections", Department of Physics, Antwerp, University of Antwerp, 2009. Download thesis (3.2 MB)
K. J. Batenburg, and J. Sijbers, "Optimal Threshold Selection for Tomogram Segmentation by Projection Distance Minimization", IEEE Transactions on Medical Imaging, vol. 28, no. 5, pp. 676-686, June, 2009. Download full paper (2.51 MB)
K. J. Batenburg, and J. Sijbers, "Generic iterative subset algorithms for discrete tomography", Discrete Applied Mathematics, vol. 157, no. 3, pp. 438-451, 2009. Download full paper (1.24 MB)
K. J. Batenburg, and J. Sijbers, "Adaptive thresholding of tomograms by projection distance minimization", Pattern Recognition, vol. 42, no. 10, pp. 2297-2305, April, 2009. Download full paper (1.05 MB)


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)