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Ordered subset expectation maximization

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This is an old revision of this page, as edited by Melcombe (talk | contribs) at 13:02, 30 August 2011 (Undid revision 446932741 by 211.30.207.3 (talk)it is standard that all points made should have more than one citation where possible). 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).

In mathematical optimization, the ordered subset expectation maximization (OSEM) method is an iterative method that is used in computer tomography.

In applications in medical imaging, the OSEM method is used for positron emission tomography, for single photon emission computed tomography, and for X-ray computed tomography.

The OSEM method is related to the expectation maximization (EM) method of statistics. The OSEM method is also related to methods of filtered back projection.

References

  • Hudson, H.M., Larkin, R.S. (1994) "Accelerated image reconstruction using ordered subsets of projection data", IEEE Trans. Medical Imaging, 13 (4), 601–609 doi:10.1109/42.363108
  • Ing-Tsung Hsiao and Hsuan-Ming Huang (2010) "An accelerated ordered subsets reconstruction algorithm using an accelerating power factor for emission tomography", Physics in Medicine and Biology 55 599. doi:10.1088/0031-9155/55/3/003
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