Temporal Bone Computed Tomography (CT) with Bone Window
This test uses X-rays to create detailed images of the bones in your ear, including the middle and inner ear structures, which can help diagnose issues like infections, structural abnormalities, or other conditions affecting hearing and balance.
["A CT scan of the temporal bone helps identify problems in your ear’s anatomy that may affect hearing or balance."]
Key facts at a glance
- LOINC
- 36773-0
- Short code
- CT Temporal bone
- Synonyms
- CT Temporal bone
- Category
- chemistry
- 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
Why This Test Is Done
Your doctor may recommend a temporal bone CT scan if you have symptoms like unexplained hearing loss, ringing in the ears (tinnitus), frequent ear infections, vertigo (spinning sensation), or if they suspect a structural issue such as a fracture, tumor, or fluid buildup in the ear.
What to Expect Before the Test
You’ll typically lie on a table that moves through a large, doughnut-shaped machine. A contrast dye may be used to highlight certain structures, and you’ll need to hold still for the duration. Avoid eating or drinking for a few hours before the procedure if contrast is involved.
During the Test
The test takes about 15–30 minutes. You’ll hear clicking noises as the machine takes images, but you won’t feel pain. Stay as still as possible to ensure clear images.
After the Test
You can usually return to normal activities immediately. If contrast dye was used, drink plenty of fluids to help it exit your body. Watch for any signs of allergic reaction, such as rash or difficulty breathing, and contact your doctor if you experience severe discomfort.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
This test is critical for diagnosing conditions like otosclerosis (a hearing disorder), cholesteatoma (a skin growth in the ear), Meniere’s disease (a balance disorder), or complications from infections like labyrinthitis. It can also help evaluate trauma, tumors, or congenital anomalies in the ear.
Short name
Temporal Bone CT Scan
Frequently asked questions
How long will it take to get my results?
Is this test painful?
Can I eat or drink before the test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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