Magnetic Resonance Angiography, Lower-Extremity Runoff with Intravenous Contrast
An imaging test that uses magnetic fields and intravenous contrast to examine arteries throughout the lower legs, often including runoff below the knees.
["This MRA shows blood flow through the arteries of both legs and can help identify narrowing, blockages, or aneurysms."]
Key facts at a glance
- LOINC
- 105134-1
- Short code
- MRA LE ves-R W contr IV
- Synonyms
- MRA LE ves-R W contr IV
- Category
- liver
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 0
- Ref high
- 20
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- mr-angio
- CPT
- 85651
- 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?
Lower-extremity runoff magnetic resonance angiography, or MRA, is an imaging test that creates detailed pictures of the arteries in the legs. Intravenous contrast is used to improve visualization of blood flow from the upper thighs through the lower legs and feet.
Why might I need this test?
The test may be ordered to evaluate poor circulation, leg pain with walking, nonhealing wounds, or a suspected artery blockage. It may also be used to assess an aneurysm, plan an artery procedure, or monitor blood flow after treatment.
How is the test performed?
You lie on a padded table that moves into the MRI scanner. An intravenous line is used to give contrast, and several sets of images are taken while you remain still. The scan may take 30 to 60 minutes, although timing varies.
How do I prepare for the test?
Follow the imaging center's instructions and tell the care team about kidney disease, prior contrast reactions, pregnancy, or implanted medical devices. Do not stop prescribed medicines unless instructed, and follow any fasting or medication instructions provided for the scan.
Reference range
Adult males: 0-15 mm/hr; Females: 0-20 mm/hrN/A
No special preparation required. CRP may be affected by acute illness.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Abnormal findings may indicate narrowing or blockage of a leg artery, an aneurysm, or another circulation problem. The images also help clinicians determine whether treatment or an interventional procedure may be needed. Results should be interpreted by your clinician in combination with your symptoms and other tests.
Short name
Lower-extremity MRA with contrast
Frequently asked questions
Does this test use radiation?
Is intravenous contrast always required?
Will I need to stay still during the scan?
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