Liver Fat and Iron Quantification MRI

Eligibility Details: Inclusion Criteria: 1. Healthy Volunteers: - Healthy subjects 18 years or older 2. Clinical Patients: - Patients who are 18 years or older and who are scheduled for a routine clinically indicated MRI exam at University of California Los Angeles Exclusion Criteria: 1. Healthy Volunteers: - Age less than 18 years - Subject with the following devices/implants/conditions will be excluded: 1. cardiac pacemakers 2. defibrillators 3. cochlear implants 4. intraocular metallic foreign bodies 5. intracranial aneurysm clips 6. claustrophobia - Subjects will be excluded if they have a history of severe renal disease (Creatinine level >2.5 mg/dl or Glomerular Filtration Rate <15 ml/minute/1.73m2 ) or allergy to MRI contrast agents ("dyes"). Healthy volunteers will not be studied with these agents. - Pregnant subjects will not be enrolled. Although there is no data to suggest that MRI is harmful to the fetus, this study is limited to non-pregnant subjects. 2. Clinical Patients: - Age less than 18 years - Subject with the following devices/implants/conditions will be excluded: 1. cardiac pacemakers 2. defibrillators 3. cochlear implants 4. intraocular metallic foreign bodies 5. intracranial aneurysm clips 6. claustrophobia - Subjects will be excluded if they have a history of severe renal disease (Creatinine level >2.5 mg/dl or Glomerular Filtration Rate <15 ml/minute/1.73m2 ) or allergy to MRI contrast agents ("dyes"). - Pregnant subjects will not be enrolled. Although there is no data to suggest that MRI is harmful to the fetus, this application is limited to non-pregnant subjects.