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Computed Tomography (CT) Scan of the Thumb Without Contrast

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

A CT scan uses X-rays to create detailed images of the thumb, including the bones, joints, and surrounding soft tissues, without IV contrast.

Quick summary

["This imaging test helps evaluate injuries and abnormalities in the bones, joints, and soft tissues of the thumb."]

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

Key facts at a glance

LOINC
83291-5
Short code
CT Thumb WO contr
Synonyms
CT Thumb 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?

A thumb CT scan uses X-rays and a computer to create cross-sectional images of the thumb. It can show the bones, joints, tendons, and other surrounding tissues in greater detail than a standard X-ray.

Why might I need this test?

A thumb CT may be ordered to evaluate a fracture that is difficult to see on a regular X-ray, persistent pain or swelling, joint problems, or a suspected injury involving the bone, tendons, or soft tissues.

How is the test performed?

You will lie on the CT table while the scanner rotates around your thumb. The scan is usually painless and takes only a short time, although you may be asked to remain very still. A radiologist will review the images and send the report to your clinician.

How do I prepare for the test?

Tell the imaging staff if you are pregnant or may be pregnant. Remove jewelry, metal objects, and loose items from the hand or wrist when instructed. Because no IV contrast is used, fasting is generally not required unless your clinician provides different instructions.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

The scan may identify or clarify a fracture, joint injury, bone change, tendon problem, or other structural abnormality in the thumb. Results are interpreted together with your symptoms, physical examination, and any other imaging tests. Your clinician will explain the findings and discuss whether treatment or additional testing is needed.

Short name

Thumb CT without contrast

Frequently asked questions

Does this CT scan use contrast dye?
No. “Without contrast” means no IV contrast dye is administered during the scan. Tell the staff if you have had a prior contrast reaction or have kidney disease, even though contrast is not expected for this test.
Is a thumb CT scan painful?
The scan itself is generally painless. You may feel some tightness if the scanner or positioning equipment is close to the hand, but the imaging should not cause pain.
Can a CT scan determine why my thumb hurts?
It can show structural problems such as fractures or joint abnormalities, but it may not identify every cause of pain. Your clinician may combine the CT findings with the examination and other tests to make a diagnosis.
  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