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- W2012604912 abstract "In this paper an alternative derivation of Katsevich's cone-beam image reconstruction algorithm is presented. The starting point is the classical Tuy's inversion formula. After (i) using the hidden symmetries of the intermediate functions, (ii) handling the redundant data by weighting them, (iii) changing the weighted average into an integral over the source trajectory parameter, and (iv) imposing an additional constraint on the weighting function, a filtered backprojection reconstruction formula from cone beam projections is derived. The following features are emphasized in the present paper: First, the nontangential condition in Tuy's original data sufficiency conditions has been relaxed. Second, a practical regularization scheme to handle the singularity is proposed. Third, the derivation in the cone beam case is in the same fashion as that in the fan-beam case. Our final cone-beam reconstruction formula is the same as the one discovered by Katsevich in his most recent paper. However, the data sufficiency conditions and the regularization scheme of singularities are different. A detailed comparison between these two methods is presented." @default.
- W2012604912 created "2016-06-24" @default.
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- W2012604912 date "2003-11-21" @default.
- W2012604912 modified "2023-10-12" @default.
- W2012604912 title "An alternative derivation of Katsevich's cone‐beam reconstruction formula" @default.
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- W2012604912 doi "https://doi.org/10.1118/1.1628413" @default.
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