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Magnetic Resonance Angiography (MRA), Lower-Extremity Vessels, With or Without Contrast, Intravenous

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

An MRI-based examination of the arteries supplying the legs, performed with or without intravenous contrast to assess blood flow and identify narrowing or blockages.

Quick summary

["This test evaluates the arteries in the lower extremities and may help detect narrowing, blockage, or other vascular problems."]

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

Key facts at a glance

LOINC
36416-6
Short code
MRA LE vv WO+W contr IV
Synonyms
MRA LE vv 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?

Lower-extremity magnetic resonance angiography, or MRA, is an imaging test that examines the blood vessels supplying the legs. It uses magnetic fields and radio waves to create images, with intravenous contrast sometimes added to improve vessel visibility.

Why might I need this test?

This test may be ordered to evaluate leg pain, cold or numb feet, reduced pulses, or suspected peripheral artery disease. It may also be used to assess an existing blood vessel narrowing or to plan a procedure.

How is the test performed?

You will lie on a table inside an MRI scanner while images of the vessels in your legs are taken. If contrast is used, it is given through an intravenous line in your arm. The scan usually requires you to remain still and may take 30 to 60 minutes.

How do I prepare for the test?

Follow the imaging center's instructions, and tell the staff about metal implants, claustrophobia, kidney disease, or possible pregnancy. Fasting is generally not required, but the center may give specific instructions, especially if intravenous contrast will be used.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Lower-extremity MRA

Frequently asked questions

Does this MRA test use contrast?
Some lower-extremity MRA examinations are performed without contrast, while others use an intravenous contrast agent. The order and your medical history determine which approach is appropriate.
Is the test painful?
The MRI itself is generally painless, although the scanner can be noisy and may feel confining. If intravenous contrast is used, the injection may briefly cause discomfort or a warm sensation.
What if I have a metal implant or kidney disease?
Tell the imaging staff before the appointment because some implants require special safety screening, and kidney disease may affect the choice of contrast. The radiologist will review this information before the examination.
  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