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We survey recent work on the attenuated x-ray transform, concentrating especially on the inversion formulas found in the last few years.
In this paper we present a method for deriving approximate inversion formulae for the divergent beam x-ray transform in three-space when the source set is a curve. When the source set is a planar convex curve, we obtain new approximate inversion formulae which are quasi-local. Finally we compare these methods with existing convolution-backprojec-tion… (More)