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Computed Tomography (CT) Scan of the Head and Neck Without Contrast

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

A CT scan uses X-rays to create detailed images of the head and neck. This test is performed without injected contrast dye.

Quick summary

["This scan provides detailed cross-sectional images of the head and neck without the use of contrast dye."]

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

Key facts at a glance

LOINC
82692-5
Short code
CT Head+Neck WO contr
Synonyms
CT Head+Neck 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
ct
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?

A head and neck CT scan uses X-rays and a computer to create detailed cross-sectional images of the bones, brain, sinuses, soft tissues, and nearby blood vessels. In this test, no intravenous contrast dye is used.

Why might I need this test?

Your clinician may order this scan to evaluate head or neck injuries, infection, inflammation, abnormal growths, sinus problems, or changes in the brain. It may also be used to guide further testing or treatment.

How is the test performed?

You will lie on a table that moves through a CT scanner while X-ray images are taken. The scan is generally painless and usually takes only a few minutes, although the exact time depends on the area being examined.

How do I prepare for the test?

Usually, no special preparation is needed for a CT scan without contrast. Wear comfortable clothing without metal, remove jewelry and other metal objects, and tell the imaging staff if you are pregnant or may be pregnant.

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

Head and Neck CT Without Contrast

Frequently asked questions

Does this CT scan use contrast dye?
No. “Without contrast” means no intravenous contrast dye is injected for this examination. A different order may be needed if contrast-enhanced images are required.
Is a head and neck CT scan painful?
The scan itself is generally painless. Some people feel confined in the scanner, and the X-ray machine may make clicking or humming sounds.
How soon will I receive the results?
A radiologist will review and interpret the images, usually within a timeframe determined by the facility and the urgency of the examination. Your ordering clinician will discuss the findings with 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