Joane Perim1, Eduardo Scarlatelli Pimenta1, Edson Marchiori2. 1. Department of Radiology - Federal, University of Rio de Janeiro, Rua Thomaz Cameron, 438. Valparaiso. CEP 25685.120, Petrópolis. Rio de Janeiro, Brazil. 2. Department of Radiology - Federal, University of Rio de Janeiro, Rua Thomaz Cameron, 438. Valparaiso. CEP 25685.120, Petrópolis. Rio de Janeiro, Brazil. Electronic address: edmarchiori@gmail.com.