Activity and attenuation reconstruction for emission computed tomography using emisssion data only

Author(s)

Fabiana Crepaldi Pereira

• Document type: Doctoral Thesis
• Press: Campinas, SP.
• Institution: Universidade Estadual de Campinas (UNICAMP). Instituto de Física Gleb Wataghin
• Defense date: 2004-01-07

Examining board members

Alvaro Rodolfo De Pierro; Sergio Shiguemi Furuie; Nelson Delfino d'Avila Mascarenhas; Roberto José Maria Covolan; Marcelo Knobel; Douglas Soares Galvão

• Advisor: Julio Cesar Hadler Neto; Alvaro Rodolfo De Pierro

Abstract

This thesis eals with the problem of estimating the attenuation from activity ata in emission computed tomography.We present several new methods aiming at solving the main rawback of the problem:the 'crosstalk'between activity and attenuation images.The first group of methods is base on iteratively solving a regularized maximum likelihood model and the second on using consistency conditions.Our simulations show results that indicate new directions for the solution of the 'crosstalk' problem (AU)