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To eliminate the undesired artifacts and improve reconstruction quality, we proposed, in this work, an improved SIR algorithm for low-dose CT reconstruction, constrained by a modified Markov random field (MRF) regularization.
This is similar to [24 27] where successive refinement was used to improve reconstruction distortion.
Increasing the number of frames would be expected to improve reconstruction because, in theory, objects would then have more time to move away from the degradation.
Most filters are modifications of the Ram-Lak filter, aiming to improve reconstruction results for problems with low signal-to-noise ratios and/or limited numbers of projections.
For that reason, we extended the PPCA-based framework to the probabilistic linear discriminant analysis (PLDA) [10] model to improve reconstruction performance on data with multiple subjects.
Since calculating correlation coefficient at each iteration will cost a lot of time, we also proposed a simplified algorithm, which can also improve reconstruction probability and reconstruction time is about the same as corresponding traditional algorithms.
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This is particularly important when considering currently depauperate clades that were once species-rich, such as sloths [ 3], as the fossil record holds unique information that can markedly change and improve reconstructions of character evolution [ 7– 9, 19– 219.
Refining the solution space to more closely match observed biological phenomena through improved reconstruction or expanded constraints remains an ongoing research effort for reconstructed metabolic networks.
The military also greatly improved reconstruction, prosthetics, and rehabilitation for those who need amputations.
Until it improves, reconstruction will stall and the hopes of Messrs Allawi and Bush for a decent election, enabling a strong and legitimate government to take over, will continue to look uncertain to be fulfilled.
The results are encouraging and indicate improved reconstruction quality, when utilizing the proposed method.
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