Editing Radon transform (section)

===Iterative reconstruction methods===
{{main|Iterative reconstruction}}
Compared with the ''Filtered Back-projection'' method, iterative reconstruction costs large computation time, limiting its practical use. However, due to the ill-posedness of Radon Inversion, the ''Filtered Back-projection'' method may be infeasible in the presence of discontinuity or noise. Iterative reconstruction methods (''e.g.'' [[SAMV (algorithm)|iterative Sparse Asymptotic Minimum Variance]]<ref name=AbeidaZhang>{{cite journal | last1=Abeida | first1=Habti | last2=Zhang | first2=Qilin | last3=Li | first3=Jian | last4=Merabtine | first4=Nadjim | title=Iterative Sparse Asymptotic Minimum Variance Based Approaches for Array Processing | journal=IEEE Transactions on Signal Processing | publisher=IEEE | volume=61 | issue=4 | year=2013 | issn=1053-587X | doi=10.1109/tsp.2012.2231676 | pages=933–944 | url=https://qilin-zhang.github.io/_pages/pdfs/SAMVpaper.pdf | bibcode=2013ITSP...61..933A | arxiv=1802.03070 | s2cid=16276001 }}</ref>) could provide metal artefact reduction, noise and dose reduction for the reconstructed result that attract much research interest around the world.