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Magnetic Resonance Angiography (MRA) of the Lower-Leg Vessels with Intravenous Contrast

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

An MRI examination that creates detailed images of the blood vessels in the lower legs after an intravenous contrast agent is given.

Quick summary

["This test helps identify narrowing, blockage, or other abnormalities of the lower-leg blood vessels."]

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

Key facts at a glance

LOINC
43512-3
Short code
MRA Lower leg ves-Bl W contr IV
Synonyms
MRA Lower leg ves-Bl 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 blood vessels in the lower legs. Intravenous contrast is used during the examination to make the vessels easier to see.

Why might I need this test?

This test may be ordered to evaluate reduced blood flow, pain or swelling in the leg, a suspected blood clot, or the condition of blood vessels before a procedure. It can also help assess vessels when standard imaging is not suitable.

How is the test performed?

An IV line is placed, and a contrast agent is given into a vein. You then lie on a table inside an MRI scanner, which uses magnetic fields and radio waves to create images of the lower-leg vessels. The examination usually does not require radiation.

How do I prepare for the test?

Follow the facility's instructions about eating, drinking, and taking medicines. Tell the imaging team about pregnancy, kidney disease, previous reactions to MRI or IV contrast, and any implanted medical devices, such as a pacemaker or metal-containing implant.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Lower-leg MRA with IV contrast

Frequently asked questions

Does this test use radiation?
No. MRA uses magnetic fields and radio waves rather than ionizing radiation. It may still use an IV contrast agent.
Will I feel the contrast injection?
You may feel a brief cool or warm sensation where the IV line is placed, and the needle can cause mild discomfort. Serious reactions are uncommon, but tell the staff about any prior contrast reaction.
How long does the examination take?
The time varies by facility and protocol. Plan to remain still in the scanner for the instructed period, and ask the imaging center whether you need someone to drive you home.
  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