3T MR Angiography of the Hepatic Vasculature

Inclusion Criteria: * Subjects that fulfill the criteria for living liver donation and are evaluated for the procedure with CT and MR. Exclusion Criteria: * Unable to give informed consent * Unable to comply with breathing or other imaging related instructions resulting in inability to obtain diagnostic quality MRI studies * Not suitable to undergo MRI with a gadolinium-based contrast agent because of: * Claustrophobia, unless patient agrees to sedation measures per institutional standard practice during MR imaging * Presence of metallic objects or implanted medical devices in body per institutional safety standards * Weight greater than that allowable by the MR table * Renal failure, as determined by estimated glomerular filtration rate (eGFR) \< 30 mL/min/1.73 m2 by the Modification of Diet in Renal Disease (MDRD) model based on a serum creatinine level obtained within 28 days prior to enrollment * Known allergy-like reaction to contrast media (gadolinium) or moderate or severe allergic reactions to one or more allergens as defined by the American College of Radiology (ACR), and unwillingness to undergo pre-treatment as defined by the institution's policy and/or ACR guidance * Pregnancy (if a female is of childbearing potential --defined as a premenopausal female capable of becoming pregnant --a pregnancy test should be done)