Iterative Reconstruction in X-ray Fluorescence Tomography Based on Radon Inversion

Autor(es)

Miqueles, Eduardo X. ^[1] ; De Pierro, Alvaro R. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Campinas UNICAMP, Dept Appl Math, BR-13083859 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: IEEE TRANSACTIONS ON MEDICAL IMAGING; v. 30, n. 2, p. 438-450, FEB 2011.
• Citações Web of Science: 17

Resumo

We describe a new approach for the inversion of the generalized attenuated radon transform in X-ray fluorescence computed tomography (XFCT). The approach consists of using the radon inverse as an approximation for the actual one, followed by an iterative refinement. Also, we analyze the problem of retrieving the attenuation map directly from the emission data, giving rise to a novel alternating method for the solution. We applied our approach to real and simulated XFCT data and compared its performance to previous inversion algorithms for the problem, showing its main advantages: better images than those obtained by other analytic methods and much faster than iterative methods in the discrete setting. (AU)

• Processo FAPESP: 09/15844-4 - Inversão da transformada generalizada de Radon: novos resultados em tomografia por fluorescência
• Beneficiário: Eduardo Xavier Miqueles
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado