An iterative reconstruction algorithm in cone beam geometry: simulation and application in X-ray microtomography

An X-ray microtomograph has been built in our laboratory from a conventional scanning electron microscope. An algorithm based on Algebraic Reconstruction Techniques (ART) has been developed to reconstruct the internal structure of the imaged object. This algorithm takes into account the diverging nature of the X-ray beam. In this paper we explain the reconstruction algorithm and we analyse the quality of the reconstructed objects in terms of signal-to-noise ratio (SNR), spatial resolution and cross-entropy.