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Magnetic Resonance Angiography, Lower Extremity Vessels — With or Without Intravenous Contrast

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

An imaging test that uses magnetic fields and sometimes intravenous contrast to examine blood vessels in the lower legs and feet.

Quick summary

["Lower extremity MRA helps evaluate narrowing, blockage, aneurysms, or clots in the leg blood vessels."]

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

Key facts at a glance

LOINC
36849-8
Short code
MRA LE vv-L WO+W contr IV
Synonyms
MRA LE vv-L 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, creates detailed images of the arteries and veins in the legs and feet. The scan may be performed with or without intravenous contrast, depending on the order and the vessels being evaluated.

Why might I need this test?

This test may be ordered to investigate leg pain, cold or numb feet, wounds that heal slowly, unexplained swelling, or suspected blood clots. It can also help assess blood-vessel narrowing, aneurysms, and venous problems or plan a procedure.

How is the test performed?

You will lie on a table inside an MRI scanner while images are taken. If contrast is used, it is given through an intravenous line. The scan does not use ionizing radiation, and the technologist will guide you about remaining still during the examination.

How do I prepare for the test?

Follow the imaging center's instructions, and do not fast unless specifically asked. Tell the care team if you are pregnant, have kidney disease, have had an allergic reaction to contrast, or have metal implants, a pacemaker, or other devices that may affect MRI safety.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Abnormal findings may indicate narrowing or blockage of an artery, an aneurysm, blood clot, or impaired venous blood flow. The results are interpreted together with symptoms and other examinations and may guide further testing or treatment.

Short name

Lower Extremity MRA

Frequently asked questions

Is lower extremity MRA the same as a standard MRI?
MRA is a specialized MRI technique focused on blood vessels. It may use intravenous contrast to make the vessels easier to see.
Does the test use radiation?
No. MRI uses magnetic fields and radio waves rather than ionizing radiation.
Will I need an IV line?
An IV line is needed if the ordered protocol includes contrast. The imaging center will explain whether contrast will be used before the scan begins.
  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