identify a arteriovenous malformation inside the brain or elsewhere.detect atherosclerotic (plaque) disease in the carotid artery of the neck, which may limit blood flow to the brain and cause a stroke.identify abnormalities, such as aneurysms, in the aorta, both in the chest and abdomen, or in other arteries.abdomen (such as the kidneys and liver).What are some common uses of the procedure?ĭoctors use MRA to examine blood vessels in key areas, including the:

The doctor or the technologist will usually administer the contrast material by placing a small intravenous (IV) catheter in a vein in your arm. Gadolinium is less likely to cause an allergic reaction than the iodinated contrast material used in CT angiography. If needed, an injection of a gadolinium-based contrast material may be used. This exam, like all MR-based exams, does not use radiation.Īn MRA exam may or may not use contrast material. In magnetic resonance angiography (MRA), a powerful magnetic field, radio frequency waves and a computer are used to evaluate blood vessels and help identify abnormalities.

fluoroscopy ( x-rays) to help place catheters into blood vessels and inject contrast to help visualize them.

In some cases, contrast material is used. Angiography exams produce pictures of major blood vessels throughout the body. If you have a fear of close spaces or anxiety, consider asking your doctor for a mild sedative prior to the exam.ĭoctors use angiography to diagnose and treat blood vessel-related diseases. Leave jewelry at home and wear loose, comfortable clothing. Unless your doctor tells you otherwise, take your regular medications as usual. Guidelines about eating and drinking before your exam vary between facilities. Sometimes, your doctor will give you a card with information about your implant.

Most orthopedic implants pose no risk, but you should always tell the technologist if you have any devices or metal in your body. The magnetic field is not harmful, but it may cause some medical devices to malfunction. Tell your doctor about any health problems, recent surgeries, allergies and whether you are pregnant.

The contrast material used for MRA is less likely to cause an allergic reaction than the contrast material used for computed tomography (CT). This exam does not use radiation and may require an injection of contrast material. MR angiography (MRA) uses a powerful magnetic field, radio waves and a computer to evaluate blood vessels and help identify abnormalities.

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