Molecular Imaging 2017

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