This paper studies OSEM image reconstruction algorithm on different subsets of a series of numerical simulated data
and analyzes the influence on the image convergence rate in different subsets of the same iterative number and time.In case of more subsets
the reconstructed image becomes worse by increasing iteration number and times from noise of added projective data.Reconstructing image with sequence subset(decreasing subset) can avoid that case.By comparing error of image reconstruction with different subset sort in the same time
good image on less iteration number and shorter time can be obtained by properly selected sequence subset.
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references
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