Skip to content

Computed Tomography Airway, Without Contrast

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

A CT scan creates detailed images of the breathing passages to evaluate airway narrowing, inflammation, masses, or other structural abnormalities.

Quick summary

["This scan provides detailed images of the airways without injected contrast."]

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

Key facts at a glance

LOINC
79067-5
Short code
CT Airway WO contr
Synonyms
CT Airway 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
ct
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?

Airway CT is a type of computed tomography scan that produces detailed cross-sectional images of the throat, windpipe, and main bronchi. It may be used to assess the shape and openness of the airways.

Why might I need this test?

This test may be ordered for persistent cough, breathing difficulty, wheezing, suspected airway narrowing, or evaluation of an abnormal finding on another imaging study. It can also help assess structures that may be affecting the airways.

How is the test performed?

You will lie on a CT table while an X-ray machine rotates around you. The scan is painless and usually takes only a few minutes, although you may be asked to hold your breath or breathe in a specific way.

How do I prepare for the test?

Because this version is performed without injected contrast, contrast-related preparation is generally unnecessary. Follow the facility's instructions, tell the technologist about breathing problems or motion limitations, and remove jewelry or other metal near the scanned area.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Abnormal findings may indicate airway narrowing, swelling, inflammation, scarring, an abnormal growth, or compression by nearby structures. The scan may also show the location and severity of an airway obstruction. Results should be interpreted by a radiologist in the context of your symptoms and other tests.

Short name

CT Airway

Frequently asked questions

Is airway CT the same as a CT angiogram?
No. Airway CT focuses on the structure and openness of the breathing passages, while CT angiography is designed to examine blood vessels, often using injected contrast.
Is radiation used during this test?
Yes. CT scanning uses a small amount of ionizing radiation, but the scan itself is generally quick and does not cause pain.
Why might I be asked to hold my breath?
Briefly holding your breath helps reduce motion and produces clearer images of the airways. The technologist will give you specific instructions during the scan.
  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