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

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

An MRI-based examination that creates detailed images of the arteries supplying the left leg and foot, sometimes using IV contrast.

Quick summary

["This test evaluates the blood vessels in the left leg for narrowing, blockage, or other vascular abnormalities."]

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

Key facts at a glance

LOINC
36858-9
Short code
MRA LE ves-L WO+W contr IV
Synonyms
MRA LE ves-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?

Magnetic resonance angiography, or MRA, is an imaging test that shows the arteries supplying the left leg and foot. It may be performed with or without an intravenous contrast agent.

Why might I need this test?

This test may be recommended to evaluate suspected peripheral artery disease, reduced blood flow to the leg, or symptoms such as leg cramping, numbness, coldness, or non-healing sores. It can also assess an aneurysm, blood clot, or other abnormality involving the leg's blood vessels.

How is the test performed?

You lie on a padded table while an MRI scanner captures multiple images. If contrast is used, it is given through a small intravenous line in your arm; the scan usually takes 30 to 60 minutes, although timing varies.

How do I prepare for the test?

Tell the imaging team about metal implants, heart devices, prior contrast reactions, kidney disease, and possible pregnancy. Follow the facility's instructions about eating, drinking, and taking medications, and arrive with enough time to complete safety screening.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Left Lower Extremity MRA

Frequently asked questions

Does the MRA use radiation?
No. MRI-based angiography does not use ionizing radiation, unlike a standard angiogram or CT angiography.
Is intravenous contrast always required?
No. Some MRA examinations are performed without contrast, while others use a gadolinium-based contrast agent to make the blood vessels more clearly visible.
What should I do if I have a metal implant or prior contrast reaction?
Tell the imaging team before the examination. They will review the device or prior reaction to determine whether the test can be performed safely and whether special precautions are needed.
  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