In vivo tissue characterization using magnetic techniques - Carneiro, Antônio Adilton Oliveira; Vilela, G. R.; Fernandes, J. B.; Araújo, Dráulio Barros de; Baffa, Oswaldo; Elias Júnior, Jorge; Pierre, G.; Ângulo, Ivan de Lucena; Covas, Dimas Tadeu (Neurology and Clinical Neurophysiology, 2004)