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Magnetic Resonance Angiography, Neck Vessels, Without Contrast

Published: August 9, 2026Updated: August 17, 2026

A noncontrast MRI exam creates images of the major blood vessels in the neck to help assess narrowing, blockage, or other vascular abnormalities.

Quick summary

["This imaging test evaluates the neck's major arteries and veins without injecting contrast dye."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
36549-4
Short code
MRA Neck ves WO contr
Synonyms
MRA Neck ves WO contr
Category
liver
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
22
Ref high
198
Critical range
— – 10000 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
mr-angio
CPT
82553
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 MRI-based imaging test that shows blood vessels in the neck. The “without contrast” designation means no contrast dye is injected for the examination.

Why might I need this test?

A neck MRA may be used to evaluate the carotid and vertebral arteries when there is concern about narrowing, blockage, aneurysm, or another blood-vessel abnormality. It may also be ordered after symptoms such as a transient ischemic attack, stroke, or a pulsatile neck mass.

How is the test performed?

You lie on a table inside an MRI scanner while the machine takes several images. The scan may be noisy and can take 30 to 60 minutes, depending on the imaging protocol.

How do I prepare for the test?

Follow the imaging center's instructions and tell the care team about any implanted metal devices, claustrophobia, or possible pregnancy. Fasting is generally not required, but the center may provide specific preparation instructions.

Reference range

Adult males: 22-198 U/L; Females: 22-198 U/LN/A

Specimen: serum

No special preparation required. Inform provider of any chest pain or symptoms.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Neck MRA Without Contrast

Frequently asked questions

Does this test use contrast dye?
No. This is a noncontrast MRA, so no contrast dye is injected for the examination.
Is a neck MRA the same as a routine neck MRI?
No. A routine neck MRI focuses on soft tissues and organs, while MRA specifically highlights the blood vessels.
What happens if I have a metal implant?
Tell the imaging staff about the implant before the scan. Many modern devices are MRI-compatible, but the MRI safety team must confirm whether it is safe for you.
  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 17, 2026. · Read our editorial policy