Teoria e experimentação com metodos incrementais relaxados em tomografia por emissão / Theory and experimentation with relaxed incremental methods in emission tomography

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

The main subject of this dissertation is the theory and practice in iterative incremental relaxed methods for statistical image reconstruction in Positron Emission Tomograpy | PET. Special atention is drawn to the theoretical study of the algorithms, with the presentation of new results concerning convergence with a relaxation parameter wich is allowed to vary within the subiterations and about the regularity of the sequence generated by such algorithms in the specific case of the log-likelihood function that arises in PET. Furthermore, an experimental comparsion is made to test the quality of the image obtained with relaxed methods against those generated by non-relaxed ones.

ASSUNTO(S)

computerized tomography tomography tomography emission tomografia tomografia - emissão tomografia computadorizada

ACESSO AO ARTIGO

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