Proposal of a protable few view tomograph with divergent beams
DOI:
https://doi.org/10.15381/rif.v13i01.8853Keywords:
Tomography, reconstruction, inverse problems, algorithm, Bregman is distance.Abstract
In this paper we present a model for building a portable computed tomography (CT) scanner of few views. We consider (1) a circular tomograph of 80 cm diameter, with a reconstructed image of 20 cm diameter. (2) The scanner has 6 views with 36 cones per view . The 216 detectors on the inner surface scanner are fixed. (3)The point sources are in fixed position. For image reconstrucction, we use a discretization through radiation paths between sources and detectors, the intersection of these pathways form a natural base discretization. The reconstruccion algorithm is the r-ART, based in Bregmans distance as a regularization term. Bregmans distance is contructed with a convex function with a parameter r=0.1. Reconstructed images examples are presented. The reconstructed images show a child head with an anomaly. The reconstruction data was obtained using the Monte Carlo N Particle, MCNP, code.Downloads
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Copyright (c) 2010 Mariella Berrocal Tito, Hidmer Laulate Melgarejo, Raúl Carita Montero
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