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Magnetic Resonance Angiography, Bilateral Lower-Extremity Vessels, Without Contrast

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

An MRI-based imaging test that evaluates blood vessels in both lower extremities without using a contrast agent.

Quick summary

["This test helps doctors assess the arteries and other blood vessels in both legs for narrowing, blockage, or other abnormalities."]

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

Key facts at a glance

LOINC
36450-5
Short code
MRA LE ves-Bl WO contr
Synonyms
MRA LE ves-Bl 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?

Magnetic resonance angiography, or MRA, creates detailed images of blood vessels. This test evaluates the vessels in both lower extremities and is ordered without contrast according to the test name.

Why might I need this test?

Lower-extremity MRA may be used to investigate reduced circulation, leg pain, swelling, numbness, or a suspected blood-vessel disorder. It can help evaluate arteries that supply the legs and other vessels affected by conditions such as peripheral arterial disease.

How is the test performed?

You lie on a table inside an MRI scanner while images of the vessels in your legs are acquired. The test is generally painless, although the scanner can be noisy, and you may be asked to remain still.

How do I prepare for the test?

Follow the imaging center's instructions, particularly regarding metal objects, implanted devices, and medications. Tell staff if you have a pacemaker, metal implant, claustrophobia, or any other health concern before the scan.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Lower-Extremity MRA Without Contrast

Frequently asked questions

Is this an X-ray test?
No. MRA uses magnetic fields and radio waves to create images of blood vessels, so it does not use ionizing radiation.
Does this test use contrast dye?
The test name specifies that it is performed without contrast. Always tell the imaging team about any prior contrast reaction or kidney problems.
Will the test hurt?
The test itself is usually painless. You may feel pressure or warmth in the scanner, and enclosed spaces can be uncomfortable for some people.
  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