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Magnetic Resonance Angiography, Orbital Vessels, Without and With Intravenous Contrast

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

An MRA of the orbital blood vessels is performed without contrast and with IV contrast to evaluate blood flow and possible narrowing or blockage.

Quick summary

["This imaging test evaluates the blood vessels around the eyes and may identify narrowing, blockage, or other vascular abnormalities."]

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

Key facts at a glance

LOINC
43458-9
Short code
MRA Orbit ves WO+W contr IV
Synonyms
MRA Orbit ves 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 in and around the eye sockets. Images are typically obtained first without contrast and then after intravenous contrast is given.

Why might I need this test?

This test may be used to investigate symptoms such as vision changes, eye pain, swelling, or reduced blood flow. It can also help evaluate orbital blood vessels before or after a procedure or in people with certain vascular conditions.

How is the test performed?

You lie on a table while a large MRI scanner takes images of the orbital blood vessels. The scan may include an injection of IV contrast through a vein in your arm, depending on the examination order.

How do I prepare for the test?

Tell the imaging team about any implanted devices, metal objects, prior contrast reactions, kidney problems, or possible pregnancy. Remove jewelry and other metal items as instructed; fasting is generally unnecessary unless your imaging center provides specific instructions.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Orbital MRA with and without IV contrast

Frequently asked questions

Does orbital MRA use radiation?
No. MRA uses magnetic fields and radio waves rather than ionizing radiation.
Why are some images taken with and others without contrast?
The images without contrast show the vessels and blood flow, while contrast-enhanced images can make vessels and nearby abnormalities easier to evaluate.
Is the contrast material different from CT contrast?
Often yes. MRA contrast is usually gadolinium-based rather than the iodinated contrast commonly used for CT, but the exact agent should be confirmed with the imaging center.
  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