Participants undergo an MRI. For this procedure, the subject lies still on a table that slides into a narrow metal cylinder (the MRI scanner) for 30 to 60 minutes. A special pad or tube is placed around the abdomen to improve the image of the liver obtained. Earplugs are placed in the ears to muffle loud thumping and knocking sounds that occur with the electrical switching of the magnetic field. The findings of the MRI are compared with those of the liver biopsy.