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CT Scan of the Sinuses with Intravenous Contrast

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

A CT scan uses X-rays and IV contrast to create detailed images of the sinus cavities and nearby structures.

Quick summary

["This scan can help identify sinus disease, inflammation, polyps, or other structural abnormalities."]

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

Key facts at a glance

LOINC
36255-8
Short code
CT Sinuses W contr IV
Synonyms
CT Sinuses 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
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?

A sinus CT scan is an imaging test that creates detailed pictures of the air-filled spaces around the nose. Intravenous contrast is injected to improve the visibility of tissues, blood vessels, and areas of inflammation.

Why might I need this test?

Your clinician may order this scan to evaluate persistent or severe sinus symptoms, suspected infection, nasal polyps, facial injury, or other problems affecting the sinuses. It may also help guide treatment or surgery.

How is the test performed?

You usually lie on a table while an X-ray machine moves around your head. IV contrast is given through a vein in your arm, and the scan is generally quick. You may be asked to remain still and avoid swallowing briefly during the images.

How do I prepare for the test?

Follow your clinician's instructions and tell the imaging staff about kidney disease, previous contrast reactions, allergies, pregnancy or breastfeeding, and any medicines you take. Metal objects and jewelry may need to be removed before the scan.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

CT sinuses with IV contrast

Frequently asked questions

Is a sinus CT scan the same as a routine X-ray?
No. CT provides more detailed cross-sectional images than a standard facial X-ray, which can make small areas of inflammation or other changes easier to evaluate.
Does IV contrast usually cause side effects?
Most people tolerate iodinated contrast without problems. Some may experience a warm sensation, nausea, or a metallic taste, while allergic-like reactions and kidney-related complications are uncommon.
Will I be able to drive home after the scan?
Most people can leave normally afterward, but you may feel mildly tired or lightheaded. If you received sedating medication, your care team will give specific instructions about driving and arranging transportation.
  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