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

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

An imaging test that uses magnetic resonance imaging to examine blood vessels in the right leg and identify narrowing, blockage, or other vascular changes.

Quick summary

["This test evaluates the blood vessels in your right leg and may use intravenous contrast to improve image clarity."]

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

Key facts at a glance

LOINC
36850-6
Short code
MRA LE vv-R WO+W contr IV
Synonyms
MRA LE vv-R 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, creates detailed images of blood vessels. This test focuses on the arteries in the right lower extremity, from the upper thigh through the leg and foot.

Why might I need this test?

A lower-extremity MRA may be recommended to evaluate reduced blood flow, pain while walking, a weakened or absent pulse, or suspected peripheral arterial disease. It may also be used to assess other blood-vessel abnormalities.

How is the test performed?

You will lie on a table inside an MRI scanner while images of the leg's blood vessels are recorded. Intravenous contrast may be injected through a vein to highlight the vessels; the exact protocol depends on the order and the facility.

How do I prepare for the test?

Tell the imaging team if you have a contrast allergy, kidney disease, implanted medical devices, or a possibility of pregnancy. Remove jewelry and other metal objects and follow the facility's instructions about eating, drinking, and taking medications.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Abnormal findings may indicate narrowing or blockage of an artery, reduced blood flow to the leg, or an aneurysm. The results should be interpreted with your symptoms, examination, and other tests by your healthcare professional.

Short name

Right Leg MRA

Frequently asked questions

Does this test use radiation?
No. MRA uses magnetic fields and radio waves rather than ionizing radiation.
Why might I need intravenous contrast?
Contrast can make blood vessels easier to see, especially when evaluating narrowing or other vascular abnormalities. The imaging team will explain whether contrast is planned and how it will be administered.
Will I be able to drive after the test?
If you receive only a standard anesthetic agent, you may be able to drive as usual. If sedation is used, you will need a driver and should follow the facility's recovery instructions.
  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