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Magnetic Resonance Angiography, Left Thigh Vessels — Without Contrast

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

A noninvasive MRI scan that produces images of blood vessels in the left thigh without using a contrast agent.

Quick summary

["This scan helps evaluate the left thigh's blood vessels for narrowing, blockage, or other vascular abnormalities."]

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

Key facts at a glance

LOINC
43514-9
Short code
MRA Thigh ves-L WO contr
Synonyms
MRA Thigh ves-L 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, uses MRI technology to create detailed images of blood vessels. This test evaluates vessels in the left thigh without injecting a contrast agent.

Why might I need this test?

A clinician may order this scan to investigate reduced blood flow, swelling, pain, or unexplained changes in the left leg. It may also be used to assess blood vessels before or after a vascular procedure.

How is the test performed?

You will lie on a padded table inside the MRI scanner. The scanner uses magnetic fields and radio waves to generate images, and you may be asked to remain still during the examination.

How do I prepare for the test?

Follow the instructions provided by the imaging center. You may need to remove jewelry, keys, cards, and other metal-containing items, and you should tell the staff if you have an implanted medical device or are pregnant.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Abnormal findings may indicate narrowing, blockage, irregular vessel walls, or an aneurysm affecting the left thigh circulation. Results should be interpreted with your symptoms, medical history, and other imaging or laboratory tests by your clinician.

Short name

Left Thigh MR Angiography

Frequently asked questions

Does this test use contrast dye?
No. The word “without contrast” means that no contrast agent is injected for this examination.
Is the MRI scan painful?
The scan itself is generally painless, although the scanner can be noisy and may feel confining. Tell the staff if you are uncomfortable or have claustrophobia.
Why is only the left thigh examined?
The test focuses on the blood vessels in the left thigh, where a circulation problem is being evaluated. Your clinician may order additional imaging if other areas need assessment.
  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