Artículos de revistas
Activity and attenuation recovery from activity data only in emission computed tomography
Registro en:
Computational & Applied Mathematics. Soc Brasileira Matematica Aplicada & Computacional, v. 25, n. 41700, n. 205, n. 227, 2006.
0101-8205
WOS:000208135600006
Autor
De Pierro, AR
Crepaldi, F
Institución
Resumen
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) We describe the continuous and discrete mathematical models for Emission Computed Tomography (ECT) and the need for attenuation correction. Then we analyse the problem of retrieving the attenuation directly from the emission data, nonuniqueness and its consequences. We present the existing and new approaches for solving the problem. Methods are compared and illustrated by numerical simulations. The presentation focuses on Positron Emission Tomography, but we also discuss the extensions to Single Photon Emission Computed Tomography. 25 41700 205 227 Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) CNPq [300969/2003-1, 476825/2004-0] FAPESP [2002/07153-2, 04/07238-3R]