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Magnetic Resonance Angiography — With or Without Contrast

Published: August 9, 2026Updated: August 16, 2026

MRA uses magnetic resonance imaging and injected contrast, when appropriate, to examine blood vessels and identify narrowing, blockage, or aneurysm.

Quick summary

["An MRA is a noninvasive imaging test used to evaluate the condition of blood vessels."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
36860-5
Short code
MRA UE ves-L WO+W contr IV
Synonyms
MRA UE ves-L WO+W contr IV
Category
liver
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
mr-angio
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What is this test?

Magnetic resonance angiography (MRA) is an imaging test that uses a strong magnetic field and radio waves to create detailed pictures of blood vessels. It may be performed with or without injected contrast material.

Why might I need this test?

MRA may be ordered to investigate symptoms such as chest pain, shortness of breath, weakness, or a suspected blood clot. It can also be used to monitor certain conditions and evaluate blood vessels before a procedure.

How is the test performed?

You lie on a table that moves into a large scanner. The scanner takes many pictures over a period of time. If contrast is used, it is usually given through a vein in your arm.

How do I prepare for the test?

Follow the instructions provided by the imaging center. Tell the care team if you have a contrast allergy, kidney disease, pregnancy, implanted medical devices, or metal in your body. You may need to avoid food and drinks for a period before the scan.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

An abnormal MRA may show narrowing or blockage of a blood vessel, an aneurysm, an abnormal connection between vessels, or another structural problem. Findings should be interpreted by your clinician in combination with your symptoms, examination, and other tests.

Short name

MRA

Frequently asked questions

Does an MRA use radiation?
No. MRA uses magnetic fields and radio waves rather than ionizing radiation.
Is contrast material always required for an MRA?
No. Some MRA examinations are performed without contrast, while others use an injected contrast agent to make blood vessels clearer.
How long does an MRA take?
The time varies with the area being examined and whether contrast is used. The imaging center can provide a more specific estimate before your appointment.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy