# The Use of Sieves to Stabilize Images Produced with the EM Algorithm for Emission Tomography

@article{Snyder1985TheUO, title={The Use of Sieves to Stabilize Images Produced with the EM Algorithm for Emission Tomography}, author={D. Snyder and M. Miller}, journal={IEEE Transactions on Nuclear Science}, year={1985}, volume={32}, pages={3864-3872} }

Images produced in emission tomography with the expectation-maximization (EM) algorithm have been observed to become more 'noisy' as the algorithm converges towards the maximum-likelihood estimate. We argue in this paper that there is an instability which is fundamental to maximum-likelihood estimation as it is usually applied and, therefore, is not a result of using the EM algorithm, which is but one numerical implementation for producing maximum-likelihood estimates. We show how Grenader's… Expand

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