Examination of the Hemodynamics of the Portal Venous System in Normal Volunteers Using Magnetic Resonance Imaging

Fecha de inicio: 1 de agosto de 1998

INCLUSION CRITERIA Normal adult volunteers in good health with no history of liver disease or alcohol abuse - minimum age: 18 years. Physically able to tolerate lying within the bore of the magnet for 1-2 hours (usual study is expected to last approximately 1-1.5 hours). Subjects should not be claustrophobic. Normotensive: Upper limit of Systolic Blood Pressure 140 mm Hg; Upper limit of Diastolic Blood Pressure 90 mm Hg. No known history of vascular disease, including but not limited to the presence of cardiovascular risk factors such as smoking, or if receiving vasoactive medications such as for treatment of hypertension. Weight range: 120 lbs. to 250 lbs. Not pregnant. If a female subject is in her child bearing years and at risk for pregnancy, subject must be using a reliable birth control method and must be within two weeks of the onset of the last menstrual period/ No relative or specific contraindications for MRI exam: including, but not limited to, metal objects in the body such as pacemakers, aneurysm clips, cochlear implants, metallic implants (orthopedic appliance, artificial cardiac valve) or shrapnel. Subjects whose occupation places them at risk of having unsuspected metal fragments in the eye, such as welders and metal workers, will be excluded, No known hearing impairment.