Magnetic Resonance Angiography, Lower-Extremity Vessels — Intravenous Contrast
An MRI-based exam uses IV contrast to assess lower-extremity blood vessels for narrowing, blockage, aneurysms, or other vascular abnormalities.
["This test creates detailed images of the arteries or veins in the legs to help identify blood-vessel disease."]
Key facts at a glance
- LOINC
- 105133-3
- Short code
- MRA LE ves-L W contr IV
- Synonyms
- MRA LE ves-L 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, or MRA, is an imaging test that shows blood vessels using magnetic fields and, when indicated, intravenous contrast. In this test, the vessels of the lower extremities are examined.
Why might I need this test?
Lower-extremity MRA may be ordered to evaluate leg pain, cold or numb feet, weak pulses, swelling, or a suspected blood clot. It can also be used to assess suspected peripheral artery disease, aneurysms, or vascular abnormalities.
How is the test performed?
You lie on a table that moves inside an MRI scanner. An IV line may be used to administer contrast, and the scanner takes a series of images while you remain still. The examination does not use ionizing radiation.
How do I prepare for the test?
Tell the imaging team about prior contrast reactions, kidney disease, pregnancy, implanted devices, and metal in your body. Follow the facility's instructions about medications, food, and fluids; do not stop prescribed medicines unless your clinician tells you to.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Abnormal findings may indicate narrowing or blockage of an artery or vein, an aneurysm, blood clot, or an unusual vessel formation. The results are interpreted together with symptoms, examination findings, and other tests. Your clinician will explain which findings are important and whether additional evaluation or treatment is needed.
Short name
Lower-extremity MRA with contrast
Frequently asked questions
Does lower-extremity MRA use radiation?
Is IV contrast always required for this test?
What if I am pregnant or have kidney disease?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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