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Block-iterative methods for image reconstruction from projections

1996; Institute of Electrical and Electronics Engineers; Volume: 5; Issue: 5 Linguagem: Inglês

10.1109/83.499919

1941-0042

C.L. Byrne,

Advanced X-ray and CT Imaging

The simultaneous MART algorithm (SMART) and the expectation maximization method for likelihood maximization (EMML) are extended to block-iterative versions, BI-SMART and BI-EMML, that converge to a solution in the feasible case, for any choice of subsets. The BI-EMML reduces to the "ordered subset" EMML of Hudson et al. (1992, 1994) when their "subset balanced" property holds.