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Literature DB >> 18218422

On the relation between the ISRA and the EM algorithm for positron emission tomography.

Abstract

The image space reconstruction algorithm (ISRA) was proposed as a modification of the expectation maximization (EM) algorithm based on physical considerations for application in volume emission computered tomography. As a consequence of this modification, ISRA searches for least squares solutions instead of maximizing Poisson likelihoods as the EM algorithm. It is shown that both algorithms may be obtained from a common mathematical framework. This fact is used to extend ISRA for penalized likelihood estimates.

Year: 1993 PMID： 18218422 DOI： 10.1109/42.232263

Source DB: PubMed Journal: IEEE Trans Med Imaging ISSN： 0278-0062 Impact factor: 10.048

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Cited

19 in total

On the relation between the ISRA and the EM algorithm for positron emission tomography.

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8. Comparison of SIRT and SQS for Regularized Weighted Least Squares Image Reconstruction.

9. Model-based tomographic reconstruction of objects containing known components.

10. Image Reconstruction: From Sparsity to Data-adaptive Methods and Machine Learning.