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Magnetic Resonance Angiography, Bilateral Lower-Extremity Arteries — Intravenous Contrast

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

This imaging test uses magnetic resonance imaging and intravenous contrast to examine the arteries supplying both legs, helping identify narrowing or other blood-vessel problems.

Quick summary

["The test can show narrowing, blockage, or other abnormalities in the arteries of both legs."]

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

Key facts at a glance

LOINC
26181-8
Short code
MRA TI ves-Bl W contr IV
Synonyms
MRA TI ves-Bl 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, creates detailed images of blood vessels without using X-rays. In this test, the arteries supplying both lower legs are examined, usually with contrast injected into a vein.

Why might I need this test?

A lower-extremity MRA may be ordered to evaluate reduced blood flow, leg pain, cold or discolored feet, a nonhealing wound, or a suspected blockage. It may also be used to plan treatment or monitor a known artery condition.

How is the test performed?

You lie on a table while the scanner images the arteries in your legs. Intravenous contrast may be injected through an arm vein to make the vessels easier to see, and the scan generally takes 30 to 60 minutes.

How do I prepare for the test?

Follow the imaging center's instructions, and tell the staff about kidney disease, prior contrast reactions, pregnancy, implanted medical devices, or metal in your body. You may be asked to remove jewelry and other metal objects before the scan.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Lower-extremity MRA

Frequently asked questions

Does this test use radiation?
No. MRA uses magnetic fields and radio waves rather than X-ray radiation, although intravenous contrast is commonly used.
Is intravenous contrast safe for everyone?
Most people tolerate it well, but kidney disease or a previous serious contrast reaction may require special precautions. Tell the imaging staff about any relevant medical history before the procedure.
Will I need to have the test repeated?
Sometimes limited images may not provide enough detail, or another study may be needed to clarify a finding. The radiology team will explain the next step after the images are reviewed.
  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