Paulo Cesar de C esar, MD, MSc (1), Augusto Campagna Torres, MD (2), Carlos Henrique Pasqualotto Oliani, MD (3), Marcelo Rodrigues de Abreu, MD (4) 1 Orthopedic Surgeon, Hospital Mae de Deus, Porto Alegre, RS, Brazil 2 Orthopedic Surgeon, Hospital Mae de Deus, Porto Alegre, RS, Brazil 3 Radiologist, Skeletal-Muscle, Hospital Mae de Deus, Porto Alegre, RS, Brazil 4 Radiology Coordinator, Hospital Mae de Deus, Porto Alegre, RS, Brazil