Ordered subset expectation maximization

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 computed 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

• Hutton, Brian F., Hudson, H. Malcolm, Beekman, Freek J. (1997) "A clinical perspective of accelerated statistical reconstruction", European Journal of Nuclear Medicine and Molecular Imaging, 24 (7), 797–808 doi:10.1007/BF00879671

• 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

External links

• Home page with IEEE paper and more information
• Software

This statistics-related article is a stub. You can help Wikipedia by expanding it.v · Categories: Optimization algorithms Medical statistics Medical imaging Statistics stubs Wikimedia Foundation. 2010. Игры ⚽ Поможем написать реферат ISTAR Pico das Agulhas Negras Look at other dictionaries: Expectation-maximization algorithm — An expectation maximization (EM) algorithm is used in statistics for finding maximum likelihood estimates of parameters in probabilistic models, where the model depends on unobserved latent variables. EM alternates between performing an… …   Wikipedia List of statistics topics — Please add any Wikipedia articles related to statistics that are not already on this list.The Related changes link in the margin of this page (below search) leads to a list of the most recent changes to the articles listed below. To see the most… …   Wikipedia List of numerical analysis topics — This is a list of numerical analysis topics, by Wikipedia page. Contents 1 General 2 Error 3 Elementary and special functions 4 Numerical linear algebra …   Wikipedia List of mathematics articles (O) — NOTOC O O minimal theory O Nan group O(n) Obelus Oberwolfach Prize Object of the mind Object theory Oblate spheroid Oblate spheroidal coordinates Oblique projection Oblique reflection Observability Observability Gramian Observable subgroup… …   Wikipedia Category:Optimization algorithms — An optimization algorithm is an algorithm for finding a value x such that f(x) is as small (or as large) as possible, for a given function f, possibly with some constraints on x. Here, x can be a scalar or vector of continuous or discrete values …   Wikipedia Gibbs sampling — In statistics and in statistical physics, Gibbs sampling or a Gibbs sampler is an algorithm to generate a sequence of samples from the joint probability distribution of two or more random variables. The purpose of such a sequence is to… …   Wikipedia 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”