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Magnetic Resonance Angiography, Lower Extremities, Without Contrast

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

An imaging test that uses magnetic fields and radio waves to show blood vessels in the lower legs without injected contrast.

Quick summary

["This test can identify narrowing, blockage, aneurysms, or clots in the arteries or veins of the lower legs."]

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

Key facts at a glance

LOINC
44129-5
Short code
MRA LE ves WO contr
Synonyms
MRA LE ves 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, or MRA, creates detailed images of the arteries and veins that supply the legs. This version is performed without injected contrast.

Why might I need this test?

Your clinician may order this test to evaluate poor circulation, leg pain, swelling, unexplained foot problems, or a suspected blood clot. It may also be used to assess blood vessels before a procedure or to monitor a known condition.

How is the test performed?

You will lie on a table inside a magnetic resonance scanner while specialized coils capture images of the vessels in your legs. The scan may take 30 to 60 minutes, and you may hear tapping or knocking sounds during imaging.

How do I prepare for the test?

Follow the instructions provided by the imaging center. Tell the technologist about metal implants, medication patches, pregnancy, or a history of contrast reactions; remove jewelry and other metal objects. Fasting is usually not required for this version, but your center may give specific instructions.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Abnormal findings may indicate narrowing or blockage of an artery or vein, an aneurysm, blood clots, or other blood-vessel abnormalities. Results are interpreted together with your symptoms, medical history, and other examinations. Your healthcare professional should explain what any abnormality means in your situation.

Short name

Lower Extremity MRA

Frequently asked questions

Is this the same as a routine MRI?
It uses a similar MRI scanner but is designed specifically to produce clear images of blood vessels in the lower legs.
Will I receive an IV injection?
This test is listed as being performed without contrast, so an IV injection is generally not expected. Confirm the exact protocol with the imaging center before your appointment.
Does the scan detect blood clots?
MRA can help identify narrowing or blockage, including certain clots, but the findings may need to be compared with ultrasound, CT, or other tests.
  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