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Magnetic resonance angiography (MRA) is an imaging test. It uses MRI to create images of blood vessels throughout your body. It uses both strong magnets and radio waves to form an image that can be viewed on a computer. The test is done by a radiologist or technologist.
MRA may be used to:
Check arteries in your neck, chest, belly, pelvis, arms, legs, or brain
Find damage to your arteries caused by injuries
Look for a ballooning of the blood vessel wall (aneurysm), narrowing of the blood vessel (stenosis), or tear in the blood vessel (dissection)
Follow any directions you are given for taking medicines or for not eating or drinking before your test.
Follow your normal daily routine unless your healthcare provider tells you otherwise.
Most MRI tests take 30 to 60 minutes. Depending on the type of MRI you are having, the test may take longer. Give yourself extra time to check in.
Tell your healthcare provider if you:
Are allergic to X-ray dye (contrast medium), iodine, shellfish, or any medicines
Are pregnant or think you may be pregnant
Have any serious health problems such as kidney disease or a liver transplant (you may not be able to have the dye used for MRI)
Tend to be afraid of small, enclosed spaces (claustrophobic)
MRI uses strong magnets. Metal is affected by magnets and can distort the image. The magnet used in MRI can cause metal objects in your body to move. If you have a metal implant, you may not be able to have an MRI unless the implant is certified as MRI safe.
People with these implants should not have an MRI:
Certain clips used for brain aneurysms
Certain metal coils put in blood vessels
Ear (cochlear) implants
Be sure to tell your healthcare provider if you:
Have a bullet or other metal in your body
Have a pacemaker, surgical clips, metal plate or pins, an artificial joint, staples or screws, cochlear implants, or other implants
Have braces (you must remove any dental work)
Have had any previous surgeries
Have implanted nerve stimulators or drug-infusion ports
Have metal splinters in your body
Have tattoos or body piercings (some tattoo inks contain metal)
Wear a medicated adhesive patch
Wear makeup, since it may contain some metal
Work with metal
You’ll be asked to remove your watch, jewelry, hearing aids, credit cards, pens, pocket knives, eyeglasses, and other metal objects.
You may change into a hospital gown. An IV line may be set up.
You will lie down on a platform that slides into the MRI machine.
At times, the magnet may be within a few inches of your face. It is normal for the MRI machine to make loud knocking noises during some parts of the exam.
Several studies may be done. Dye may be injected into your vein through an IV line for some of the studies.
If you were injected with dye, drink plenty of fluids. This will help flush the dye from your body.
The radiologist will analyze the results and provide a report to your primary healthcare provider (the person who referred you for the test). Your healthcare provider will discuss the results with you when they are ready.
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