Pelvic Vein Quantitative Flow Characterization Using 2D and 4D Flow MRI

Arm 1: Inclusion Criteria: • No self-reported history of pelvic or iliac venous disease or associated symptoms Exclusion Criteria: * History of pelvic or iliac venous disease or intervention * Contraindication to MRI examination * Prisoners * Subjects ≤ 18 years of age * Pregnant women * Adults unable to provide informed consent Arm 2: Inclusion Criteria: • Clinical symptoms or imaging findings compatible with left iliac vein compression syndrome Exclusion Criteria: * History of pelvic or iliac venous intervention * Contraindication to MRI examination * Prisoners * Subjects ≤ 18 years of age * Pregnant women * Adults unable to provide informed consent Arm 3: Inclusion Criteria: • History of left iliac vein stent placement Exclusion Criteria: * Contraindication to MRI examination * Prisoners * Subjects ≤ 18 years of age * Pregnant women * Adults unable to provide informed consent