What is Magnetic Angiography (MRA)? Magnetic resonance angiography (MRA) is a special type of magnetic resonance imaging (MRI) test designed to evaluate arteries, veins, and the flowing blood within them. During an MRI examination, the patient is placed inside the opening of a very large magnet. Radiofrequency pulses are used within the magnetic field to generate detailed images of internal organs. No X-rays or ionizing radiation of any kind is necessary for an MRI exam. During an MRA exam, special types of scans are used to create pictures of flowing blood and blood vessels. Sometimes, to produce exceptionally detailed pictures, an MRI contrast (gadolinium) is injected into a vein in the arm. MRA is performed on the arteries of the neck and brain to test for any narrowing or plaque buildup that could lead to stroke, or for any weakening or ballooning of the arteries (aneurysms) that could lead to bleeding. MRA is performed on the arteries to the kidneys to test for narrowing that could lead to hypertension (high blood pressure). MRA is performed on the pelvis and legs to look for narrowing that could lead to painful walking or nonhealing ulcers. It is also used to evaluate for aneurysms or dissections of the aorta in the chest or abdomen. Patient Preparation for the Procedure There is no special diet or medication needed for an MRA exam. To prepare for the exam, all that is necessary is that the patient remove eyeglasses, hearing aids, hairpins, removable dental work, jewelry, watches, or any other metallic objects. Often the patient will be allowed to remain in street clothes, but must empty pockets of keys, credit cards, bank cards, coins, etc. Other times the patient will change into a hospital gown. Does an MRA hurt? No. There is no pain involved with an MRI/MRA examination. A special form of MRI is a MRA. Some patients with severe claustrophobia have difficulty with the test because the inside of the MRI machine is confining. As the exam proceeds, you will hear a muffled thumping sound for several minutes at a time. What are the risks of an MRI/MRA? There are no known harmful effects created by the magnetic field or the radio waves. The exam is only dangerous to patients with certain implanted devices such as pacemakers, defibrillators, cochlear implants, and aneurysm clips. MRI/MRA would not be performed on these patients. If contrast examination is necessary, then there is a very small risk of allergic reaction to the injected contrast media. Who will read my scan? All MRI/MRA exams at Radiology Associates are interpreted by board-certified diagnostic radiologists with fellowship training or with experience and special interest in MRI. How do I get the results? We will send a written report within 48 hours to your doctor. You and your doctor can then discuss the results, and how they apply to your medical care.