Activity and attenuation recovery from activity dataonly in emission computed tomography



Título del documento: Activity and attenuation recovery from activity dataonly in emission computed tomography
Revue: Computational & applied mathematics
Base de datos: PERIÓDICA
Número de sistema: 000310705
ISSN: 0101-8205
Autores: 1
Instituciones: 1Universidade Estadual de Campinas, Departamento de Matemática Aplicada, Campinas, Sao Paulo. Brasil
Año:
Volumen: 25
Número: 2-3
Paginación: 205-227
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Experimental, analítico
Resumen en inglés 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
Disciplinas: Matemáticas,
Física y astronomía
Palabras clave: Física nuclear,
Radón,
Modelos matemáticos,
Transformada atenuada,
Probabilidad máxima,
Tomografía por emisión de positrones
Keyword: Mathematics,
Physics and astronomy,
Nuclear physics,
Mathematical models,
Radon,
Attenuated transform,
Maximum likelihood,
Positron emission tomography
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