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CT Scan of a Joint with Intravenous Contrast

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

A CT scan uses X-rays and injected contrast to create detailed images of a joint and the surrounding bone and soft tissues.

Quick summary

["This scan provides detailed, contrast-enhanced images to help evaluate joint pain, injury, inflammation, or other abnormalities."]

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

Key facts at a glance

LOINC
37242-5
Short code
CT SC joint W contr IV
Synonyms
CT SC joint 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 joint CT scan is an imaging test that uses X-rays and computer technology to create detailed pictures of the joint, nearby bones, and surrounding tissues. Intravenous contrast is injected through a vein to improve the visibility of certain structures.

Why might I need this test?

Your clinician may order this scan to evaluate persistent joint pain, swelling, trauma, suspected infection, arthritis, alignment problems, or an unexplained lump or bone change. It may also be used to guide procedures or additional testing.

How is the test performed?

You will usually lie on a table while the scanner takes X-ray images from different angles. If contrast is needed, it is given through an intravenous line in your arm, and the images are taken shortly afterward. The scan does not involve removing joint fluid.

How do I prepare for the test?

Fasting is generally not required, but follow the imaging center's instructions. Tell your clinician if you are pregnant, have previously reacted to contrast, or have kidney, heart, or thyroid disease, because these factors may affect the use of contrast or require special precautions.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Joint CT Scan with IV Contrast

Frequently asked questions

Why is intravenous contrast used?
Iodinated contrast can make blood vessels and certain tissues easier to see, improving the detail of the images. The scanner and radiologist determine whether contrast is necessary for the joint being examined.
Is the CT scan painful?
The scan itself is generally painless, although lying still on the table may be uncomfortable. The IV injection may briefly feel like a sting, and some people notice a warm sensation or a metallic taste.
What should I do if I have had a contrast reaction before?
Tell the imaging center and your clinician before the appointment. They can review the prior reaction and determine what precautions or alternative imaging are appropriate.
  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