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X-ray Tomogram, 3D, Knee, Bilateral, Without Intravenous Contrast

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

A 3D X-ray imaging test that creates detailed images of both knee joints without intravenous contrast.

Quick summary

["This test uses X-rays to evaluate the bones, alignment, and joint structures of both knees."]

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

Key facts at a glance

LOINC
24784-1
Short code
XR tomo Kdny-Bl WO+W contr IV
Synonyms
XR tomo Kdny-Bl WO+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
xr-tomography
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?

This imaging test creates detailed cross-sectional X-ray images of both knee joints and may reconstruct them in three dimensions. Intravenous contrast is not used for the version of this test identified by the code.

Why might I need this test?

It may be ordered to evaluate knee pain, suspected fractures, injury, joint alignment, arthritis, or abnormalities in the surrounding bones. It can also help guide treatment or surgical planning.

How is the test performed?

You will usually lie on a padded table while an X-ray scanner takes images of both knees. The scan is generally painless, and a radiologist reviews the images and sends a report to your clinician.

How do I prepare for the test?

Follow the instructions provided by the imaging facility. Remove loose metal objects and tell the technologist if you are pregnant, may be pregnant, have recently received contrast, or have difficulty lying still; otherwise, no special preparation is usually required.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Abnormal findings may indicate a fracture, joint injury, misalignment, degenerative arthritis, bone loss, or another bone abnormality. The images are interpreted in the context of your symptoms, examination, and other tests, so your clinician should explain the meaning of any findings.

Short name

Bilateral 3D Knee Tomogram

Frequently asked questions

Is this the same as a standard knee X-ray?
It uses X-rays but produces more detailed cross-sectional images, often with 3D reconstructions. A standard X-ray may sometimes provide enough information, depending on the clinical question.
Will I receive intravenous contrast?
No. This version of the test is identified as being performed without intravenous contrast, which usually means no injection is needed.
How long does the test take?
The scan itself is usually brief, often taking only several minutes. Additional time may be needed for positioning, image review, and questions from the imaging staff.
  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