Reconstruction Scheme for Accelerated Maximum Likelihood Reconstruction: The Patchwork Structure KU Leuven
Convergence of iterative algorithms can be improved by updating groups of voxels sequentially rather than updating the whole image simultaneously. The optimal way is to choose groups of uncoupled voxels, i.e. voxels spread over the reconstruction volume. While this is most efficient for convergence reasons, updating groups of spread voxels is less efficient regarding memory access and computational burden. In this work, an image-block update ...