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CT Temporal Bone With Intravenous Contrast

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

A CT scan of the temporal bones that uses intravenous contrast to produce detailed images of the ear bones and nearby structures.

Quick summary

["This scan evaluates the temporal bones and nearby structures, particularly when contrast-enhanced imaging is needed."]

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

Key facts at a glance

LOINC
36815-9
Short code
CT Temporal bone W contr IV
Synonyms
CT Temporal bone 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 temporal bone CT scan uses X-rays and a computer to create detailed cross-sectional images of the bones surrounding the ears. Intravenous contrast may be injected through a vein to improve the visibility of certain tissues and abnormalities.

Why might I need this test?

This test may be used to evaluate persistent hearing loss, ear pain, drainage, dizziness, facial weakness, or suspected fractures. It can also help identify infections, bone changes, tumors, or complications involving the middle and inner ear.

How is the test performed?

You will lie on a CT table while the scanner takes images from several angles. If contrast is used, it is given through an intravenous line, and the scan usually takes only a short time. Ear CT images are often very thin and detailed.

How do I prepare for the test?

Follow the instructions provided by your imaging center. Tell the care team about any previous reaction to CT contrast, kidney disease, pregnancy, allergies, implanted medical devices, or medications such as metformin. Fasting may be requested in some cases, but it is not always required.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Temporal Bone CT with IV Contrast

Frequently asked questions

Is this test the same as a routine head CT?
No. A temporal bone CT is focused on the dense bones surrounding the ear and uses finer images than a routine head scan.
Does the test use radiation?
Yes. CT imaging uses ionizing radiation, although the exam itself is generally brief and the images are highly detailed.
What happens if I cannot receive contrast?
Tell the imaging team before the examination. A scan without contrast or an alternative imaging method may be appropriate, depending on the condition being evaluated.
  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