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Computing reconstruction kernels for circular 3-D cone beam tomography
Alfred K Louis1, Thomas Weber, David Theis
1Department of Mathematics, Saarland University, 66041 Saarbrücken, Germany. louis@num.uni-sb.de
Abstract:
In this paper, we present techniques for deriving inversion algorithms in 3-D computer tomography. To this end, we introduce the mathematical model and apply a general strategy, the so-called approximate inverse, for deriving both exact and numerical inversion formulas. Using further approximations, we derive a 2-D shift-invariant filter for circular-orbit cone-beam imaging. Results from real data are presented.
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