A Study of Reconstruction Artifacts in Cone Beam Tomography Using Filtered Backprojection and Iterative Em Algorithms

@inproceedings{Zeng2004ASO,
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={2004}
}

Reconstruction artifacts in cone beam tomography are studied for filtered backprojection (Feldkamp) and iterative EM algorithms. The filtered backprojection algorithm uses a voxeldriven, interpolated backprojection to reconstruct the cone beam data; whereas, the iterative EM algorithm performs raydriven 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 theâ€¦Â CONTINUE READING