The goal of this study is to evaluate non-invasive imaging techniques for determining liver steatosis (fat), inflammation (abnormal tissue swelling), and fibrosis (abnormal tissue scarring).In addition, the study group will be using other test measures including personal demographics, laboratory blood test results, and imaging measurements to determine the severity of NAFLD (non-alcoholic fatty liver disease), NASH (non-alcoholic steatohepatitis), inflammation, and fibrosis.