Magnetic Resonance Angiography (MRA)
- What is an MRI?
- What is an MRA?
- Why might my doctor recommend an MRA?
- How should I prepare for my MRA?
- How is an MRA performed?
- What type of equipment is used for an MRA?
- Will I experience any side effects from the MRI?
- How will I get the test results of my MRA?
What is an MRI?
Magnetic resonance imaging, or MRI, is a method of producing detailed pictures of organs and body tissues by exposing a patient to radio waves in a strong magnetic field. The field is measured and analyzed by a computer, which forms two- or three-dimensional images that may be viewed on a monitor. Because it uses radio waves and a magnetic field rather than x-rays, there is no exposure to radiation.
What is an MRA?
MRA stands for magnetic resonance angiography. It is an MRI study of the blood vessels. MRAs are used to assess abnormalities in the blood vessels of patients with a history of stroke, aneurysm, heart disease, and atherosclerotic vascular disease.
Why might my doctor recommend an MRA?
Your doctor might recommend an MRA if you suffer from frequent headaches. Often, MRAs also are used to evaulate problems with blood vessels such as disease and narrowing or enlargement. Additionally, MRA is helpful in detecting disease in arteries supplying blood to the brain and the development of atherosclerosis, a condition that can lead to stroke. MRA is a useful tool to detect aneurysms and evaluate your veins.
How should I prepare for my MRA?
On the day of the procedure, wear comfortable clothing and try to relax. Before the procedure begins, you will be asked if you have any metal medical equipment in your body such as a pacemaker, intrauterine device (IUD), implanted port, or infusion catheter. Due to the strong magnetic fields created by MRA, these devices may interupt the procedure. Also, make sure to notify the technologist if you might be pregnant. Before the procedure begins you also will be asked to remove any metal jewelry or metal external objects as they may interfere with the procedure.
How is an MRA performed?
You will be asked to lie on your back on a cushioned table. A device called a coil will be placed on the area to be scanned. Coils are antennas used in every scan to help image the area of interest. Different coils are designed for different parts of the body and will conform to your shape as your are being imaged. You will not experience any discomfort from the coil.
After you are positioned, the table will move under the magnet. The radiologic technologist will leave the room once the procedure begins to control the equipment and perform your scan. You will be able to communicate with the technologist through an intercom during the procedure. The machine will make a slight rapping sound as the images are being taken. In between scans the machine is quiet. The process takes between 30 and 45 minutes and is painless.
What type of equipment is used for an MRA?
An MRA can be performed in either a closed or an open MRI scanner. A closed scanner requires you to lie in a clylinder-like compartment. An open MRI is ideal for claustrophobic, pediatric, elderly, and large patients. This procedure uses a scanner that is less confining. Both types of scanners can provide your physician with accurate and detailed images.
Will I experience any side effects from the MRA?
In some cases, your physician or the radiologist may request a contrast agent (dye) be used to improve the quality of the images. The agent is designed to make organs and blood vessels more visible, and will likely cause no side effects. You may experience a metallic taste in your mouth and in rare cases you may experience more serious side effects. The technologist can answer any questions about possible side effects.
How will I get the test results of my MRA?
The results of your MRA are read by the board-certified radiologists of Professional Radiology, Inc. A detailed report will be sent your referring physician within 24 hours.
