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Image reconstruction
Analytical reconstruction
• Filtered back projection (FBP)
• Linear and thus quantitatively robust,
but suffers from streak artefacts, noisy
Iterative reconstruction
• Ordered subset expectation
maximisation(OSEM)
• Row-action maximum-likelyhood algorithm
(RAMLA)
• Performance of iterative reconstruction
is affected by number of iterations,
subsets etc – convergence problems