Both an MRI and MRA are imaging methods used to view tissues, bones, or organs inside the body. While the two procedures are similar, they have a few key distinctions. In this article, we will help you understand the difference between MRI and MRA and how to determine which one you need.
What is an MRI?
MRI or magnetic resonance imaging uses a giant magnet to create detailed images of organs and tissues in the body. The MRI machine employs both magnets and radio waves that bounce off the magnetic field and scan a specific part of the body, which is then sent to a computer to be viewed. Contrast dyes are often used to assist the radiologist in seeing the part of the body being scanned more clearly.
What is an MRA?
MRA is a type of MRI procedure. MRA or magnetic resonance angiography also uses magnets to create imaging, however, this procedure focuses more on blood vessels than the organs or tissue around them. Typically, an MRA is performed along with an MRI machine so your radiologist can identify any issues related to the blood vessels. It can also be coupled with one of the following procedures:
Fluoroscopy: An interventional procedure during which a radiologist places a catheter into the patient’s blood vessels.
Computed tomography (CT): A diagnostic imaging test used to create detailed images of internal bones, organs, blood vessels, and tissue.
In addition, an MRA procedure can be used to identify abnormalities, such as aneurysms or blockages in the blood vessels that could lead to a heart attack or stroke. Finally, the scan can be used to identify whether blood vessels have narrowed due to plaque.
MRI vs MRA
As mentioned, an MRA is a type of MRI, so they are very similar. However, the key difference between the two is what they are used to scan:
Key Similarities:
Both are non-invasive tools used to diagnose disease and ailments
Neither procedure uses radiation.
Key Differences:
MRA is primarily used to look at blood vessels, while MRI can be used to look at various organs and tissues including the spine, joints, brain, and other internal organs.
Using an MRI generally allows the radiologist to examine larger areas of the body.
Preparing for Your MRI or MRA
The preparation for an MRI or MRA is similar. You should speak with your doctor or radiologist about any concerns or questions you may have regarding the procedure. Before your test, the doctor will most likely give you instructions, such as not eating or drinking for four to six hours. Let your doctor or the imaging facility know ahead of time if you have any implanted metal devices, experience claustrophobia or are anxious about the procedure or require any special accommodations.
Whether you need an MRI or an MRA, you are in good hands with the board-certified radiology specialists at BICRAD. Schedule your appointment today!