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Magnetic Resonance Imaging, Lower Extremity — With Intravenous Contrast

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

An MRI of one or both lower extremities performed with intravenous contrast to evaluate bones, joints, soft tissues, or blood vessels.

Quick summary

["This imaging test uses MRI and intravenous contrast to create detailed pictures of the lower leg, ankle, knee, or thigh."]

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

Key facts at a glance

LOINC
39293-6
Short code
MR LE W contr IV
Synonyms
MR LE 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
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?

This is a magnetic resonance imaging (MRI) examination of the lower extremity, such as the thigh, knee, lower leg, or ankle. Intravenous contrast, often a gadolinium-based agent, may be used to improve the visibility of tissues, inflammation, tumors, or blood vessels.

Why might I need this test?

A lower-extremity MRI with contrast may be ordered to investigate persistent pain, swelling, trauma, suspected fracture, joint disease, infection, a soft-tissue mass, or problems involving the bone marrow or blood vessels.

How is the test performed?

You will lie on a table that moves into the MRI scanner. The technologist may administer intravenous contrast through a vein and take several images while you remain still. MRI does not use ionizing radiation.

How do I prepare for the test?

Tell the imaging team about metal implants, pacemaker or other implanted devices, prior contrast reactions, kidney disease, and pregnancy or breastfeeding. The facility will provide instructions, which may include avoiding food or drink and taking medicines unless your clinician directs otherwise.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Lower-extremity MRI with IV contrast

Frequently asked questions

Does this MRI use radiation?
No. MRI uses a magnetic field and radiofrequency signals rather than ionizing radiation, although intravenous contrast may be administered.
Why is intravenous contrast used?
Contrast can make certain tissues and abnormalities easier to distinguish. The imaging center will confirm the specific contrast agent and discuss any relevant risks with you.
What should I do if I have had a contrast reaction?
Tell the ordering clinician and imaging center before the appointment. Prior reactions, kidney disease, implanted medical devices, and possible pregnancy should be reviewed because they may affect how the test is planned or performed.
  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