Guilherme Jaquet Ribeiro1, Pedro Augusto Gondim Teixeira2. 1. Hospital Moinhos de Vento, Rua Ramiro Barcelos 910, Porto Alegre, 90035-000, Brazil. 2. Guilloz Imaging Department, Central Hospital, University Hospital Center of Nancy, 29 Avenue du Maréchal de Lattre de Tassigny, 54035, Nancy Cedex, France.