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Ordered subset expectation maximization

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This is an old revision of this page, as edited by Eubot (talk | contribs) at 21:14, 27 July 2008 (Hatnote formatting, see User:Eubot/Hatnote formatting). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.
This article is about an algorithm. For Israeli food corporation, see Osem (company).

Ordered subset expectation maximization (OSEM) is an expectation maximization (EM) algorithm widely used in medical imaging for positron emission tomography, single photon emission computed tomography and less frequently for X-ray computed tomography.

It improves upon the speed of previous EM techniques and improves upon the quality of previous FBP (filtered back projection) techniques.

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