%0 Conference Proceedings
%4 sid.inpe.br/sibgrapi/2015/07.14.20.29
%2 sid.inpe.br/sibgrapi/2015/07.14.20.29.18
%T Filtragem 2D de Projeções CT Afetadas por Ruído Poisson
%D 2015
%A Pinheiro, Arthur Melo,
%@affiliation Universidade Federal de São Carlos
%E Rios, Ricardo Araujo,
%E Paiva, Afonso,
%B Conference on Graphics, Patterns and Images, 28 (SIBGRAPI)
%C Salvador, BA, Brazil
%8 26-29 Aug. 2015
%I Sociedade Brasileira de Computação
%J Porto Alegre
%S Proceedings
%K Sinogram filtering, Poisson noise, CT images.
%X The diagnostic imaging by computed tomography has become popular in recent decades, causing concerns about the exposure of the human body to high doses of X-rays, which may cause cancer. Faced with this problem, studies are conducted with the objective of minimizing the dose of X-rays and maintain image quality since image degradation by noise reduction is proportional to the dose of X-rays. This paper proposes a methodology for 2D filtering noise made by Poisson projections using as a priori knowledge to the Wiener filter the result of filtering the projections by non-local filters after the stabilization of the noise variance by Anscombe transform.
%@language pt
%3 Filtragem 2D de Projeções CT Afetadas por Ruído Poisson.pdf