# A study of reconstruction artifacts in cone beam tomography using filtered backprojection and iterative EM algorithms

@inproceedings{Zeng1990ASO, title={A study of reconstruction artifacts in cone beam tomography using filtered backprojection and iterative EM algorithms}, author={Gengsheng Larry Zeng and Grant T. Gullberg}, year={1990} }

Reconstruction artifacts in cone beam tomography are studied for filtered backprojection (Feldkamp) and iterative EM algorithms. The filtered backprojection algorithm uses a voxel-driven, interpolated backprojection to reconstruct the cone beam data, whereas the iterative EM algorithm performs ray-driven projection and backprojection operations for each iteration. Two weighting schemes for the projection and backprojection operations in the EM algorithm are studied. One weights each voxel by… CONTINUE READING

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