Title: <title>Reconstruction of positron emission tomography images using maximum a posteriori and mean field annealing techniques</title>
Abstract: In the reconstruction of positron emission tomography images, each slice of the image volume is individually reconstructed from a sinogram, in which the statistics of the data elements are Poisson and the image data is hidden by the mechanism of projection. We propose a method of image reconstruction which incorporates the given data set and also reflects the a prior knowledge that the image consists of smooth noiseless regions that are separated by sharp edges. This method uses both maximum likelihood and maximum a posteriori techniques in a manner that is similar to techniques used by others, but our method incorporates a bounded prior term and adaptive annealing techniques. These advancements prevent excessive smoothing and address the difficulties presented by parameter selection and image convergence.
Publication Year: 1994
Publication Date: 1994-05-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 3
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