Examples of T1-maps of liver. A A 50-year-old female with obesity and mean liver T1 of 740 ms. Liver biopsy confirmed a normal liver. B A 65-year-old female with obesity and mean liver T1 of 901 ms. Liver biopsy showed grade 1 steatosis and fatty liver, mild lobular inflammation, ballooning of hepatocytes, and stage 4 fibrosis consistent with non-alcoholic steatohepatitis. (Image courtesy, Drs. Jiahui Li and Meng Yin, Radiology, Mayo clinic, Rochester, MN, USA)