Geodesic
Subpixel smoothing in the algebraic algorithms of 3d-tomography
Matematičeskoe modelirovanie, Tome 11 (1999) no. 8, pp. 79-90 Cet article a éte moissonné depuis la source Math-Net.Ru

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New method of smoothing over the domain less than a grid cell is suggested to suppress errors of the reconstruction with algebraic algorithms when the ray approximation is used for the transmission and emission three-dimensional tomography. The smoothing is realized as the movement of the grid nodes where the two-dimensional projections are determined. The advantage of the method has been demonstrated in numerical simulations. 
@article{MM_1999_11_8_a6,
     author = {A. V. Likhachev and V. V. Pickalov},
     title = {Subpixel smoothing in the algebraic algorithms of 3d-tomography},
     journal = {Matemati\v{c}eskoe modelirovanie},
     pages = {79--90},
     year = {1999},
     volume = {11},
     number = {8},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MM_1999_11_8_a6/}
}
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A. V. Likhachev; V. V. Pickalov. Subpixel smoothing in the algebraic algorithms of 3d-tomography. Matematičeskoe modelirovanie, Tome 11 (1999) no. 8, pp. 79-90. http://geodesic.mathdoc.fr/item/MM_1999_11_8_a6/