Fatty liver is a common abnormality among patients undergoing cross–sectional imaging of the abdomen. Its spectrum ranges from simple steatosis and steatohepatitis to fibrosis and long–term complications like liver cirrhosis and hepatocellular carcinoma. The reliable quantification of hepatic steatosis is of clinical relevance, because increasing steatosis may lead to  progression of fibrosis &  complications. The gold standard for the assessment of hepatic steatosis  is liver biopsy. Non invasive imaging techniques such as ultrasonogaphy (USG ), Computed  tomography (CT) have been used for  assessment of  fatty liver. The accuracy & reproducibility of  USG is high in evaluation of early fatty liver disease. Unenhanced CT is best imaging modality in evaluation of moderate to severe fatty liver disease.