Discussion

105 Ricardo M.C. Freitas1, José Guilherme M.P. Caldas1, Celi S. Andrade1, Patrícia M. Cury2, Hernán JC. .Rodríguez3, Said R. Rabbani3, 1Radiology Department, Universidade de São Paulo Medical School, Brazil, 2Pathology Department, Sao Jose do Rio Preto Medical School, Brazil, 3General Physics Department, Universidade de São Paulo Institute of Physics, Brazil.