Costa-Silva L, et al. - This study was designed to assess the performance of magnetic resonance elastography (MRE) in diagnosing and staging hepatic fibrosis in patients with histologically confirmed nonalcoholic fatty liver disease (NAFLD) and in distinguishing simple steatosis from nonalcoholic steatohepatitis (NASH). For detecting/staging hepatic fibrosis in NAFLD, MRE was an effective, non-invasive method. This method had good performance in discriminating normal from NAFLD subjects and between the extreme grades of fibrosis. Compared to those with simple steatosis, NAFLD patients with inflammation and without fibrosis had higher liver stiffness.