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CT Angiography of Neck Vessels — With or Without Intravenous Contrast

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

A CT scan that creates detailed images of the major blood vessels in the neck, sometimes using IV contrast to evaluate blood flow and blockages.

Quick summary

["This test helps detect narrowing, blockage, or other abnormalities in the major arteries of the neck."]

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

Key facts at a glance

LOINC
30594-6
Short code
CTA Neck ves WO+W contr IV
Synonyms
CTA Neck ves WO+W contr IV
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
ct-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?

CT angiography of the neck uses X-rays and a computer to create detailed pictures of the major blood vessels in the neck. It may be performed with or without intravenous (IV) contrast, depending on the purpose of the exam.

Why might I need this test?

Your clinician may order this test to investigate symptoms such as neck pain, a lump, dizziness, or a suspected blockage in an artery. It may also be used to assess blood vessels before a procedure or to monitor a known condition.

How is the test performed?

You lie on a table while a CT scanner takes X-ray images from different angles. If contrast is used, it is given through an IV line in your arm, and the scan is timed to capture the blood vessels clearly.

How do I prepare for the test?

Follow your clinician's instructions about fasting, medications, and IV contrast. Tell the imaging team if you have kidney disease, prior contrast reactions, iodine allergy, or possible pregnancy. Remove metal objects and tell the team if you cannot remain still or have trouble lying flat.

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

CT angiogram of the neck

Frequently asked questions

Is CT angiography the same as a routine CT scan?
No. CT angiography is a specialized CT scan focused on blood vessels, usually with IV contrast and timing designed to highlight the arteries.
Does the test require intravenous contrast?
It depends on the order. Some CT angiograms are performed with contrast, while others may be done without it, and a protocol may include both.
Is CT angiography painful?
The scan itself is generally painless. An IV needle can cause brief discomfort when contrast is injected, and you may be asked to hold still or briefly hold your breath during images.
  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