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Magnetic Resonance Angiography (MRA), Lower Extremity

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

An imaging test that uses magnetic fields to create detailed pictures of the arteries supplying the legs, with contrast used only if specified in the order.

Quick summary

["Lower-extremity MRA helps evaluate the blood vessels supplying the legs for narrowing, blockage, or other abnormalities."]

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

Key facts at a glance

LOINC
36882-9
Short code
MRA LE ves-L WO contr
Synonyms
MRA LE ves-L WO contr
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 is an imaging test that produces detailed pictures of the arteries in one or both legs. It may be performed with or without intravenous contrast, depending on the specific order.

Why might I need this test?

This test may be ordered to investigate reduced blood flow, leg pain, numbness, cold feet, or a suspected blockage. It can also assess blood vessels before a procedure or during follow-up of a known condition.

How is the test performed?

You lie on a padded table that moves into a large magnet. The scanner takes a series of images, usually taking 30 to 60 minutes. If contrast is used, it is given through a vein in your arm; the scan does not use radiation.

How do I prepare for the test?

Follow the instructions provided for your specific order. Tell the imaging team if you have a pacemaker, another implanted device, kidney disease, or a possible pregnancy, and remove jewelry, keys, cards, 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 a magnetic field and radio waves rather than ionizing radiation.
Will I receive contrast?
It depends on the specific order. Some MRA examinations are performed without contrast, while others use an intravenous contrast agent; the imaging center can confirm this beforehand.
Will the test be uncomfortable?
Most people find the test tolerable, although the scanner can feel cramped and may make loud knocking sounds. If contrast is used, a brief warm or cool sensation may occur when it is injected.
  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