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CT Examination of the Thoracic and Lumbar Spine Without Contrast

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

A CT scan creates detailed images of the thoracic and lumbar spine to evaluate bones, discs, and surrounding tissues without using IV contrast.

Quick summary

["This CT scan examines the middle and lower spine without IV contrast."]

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

Key facts at a glance

LOINC
69104-8
Short code
CT Extr-L WO contr
Synonyms
CT Extr-L 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?

This is a computed tomography scan of the thoracic and lumbar spine, which are the middle and lower sections of the backbone. It uses X-rays to create detailed images of the vertebrae, spinal discs, spinal canal, and nearby tissues.

Why might I need this test?

A spine CT may be ordered to evaluate back pain, trauma, suspected fractures, disc-related problems, narrowing of the spinal canal, infection, or other changes in the vertebrae and surrounding tissues.

How is the test performed?

You will lie on a table while an X-ray machine rotates around the area being examined. The images are usually reviewed by a radiologist, and the results are sent to your ordering clinician. No IV contrast dye is used for this examination.

How do I prepare for the test?

Fasting is generally not required, but follow any instructions from the imaging facility. Remove jewelry, body piercings, and metal objects that could interfere with the images. Tell the care team if you are pregnant, may be pregnant, or have any allergies.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Thoracic/Lumbar CT Without Contrast

Frequently asked questions

Does this CT scan use contrast dye?
No IV contrast dye is used for the examination identified as “without contrast.” If the facility asks you to receive oral contrast for a related study, follow its specific instructions.
Is this the same as a routine spine X-ray?
No. CT produces more detailed cross-sectional images and may reveal fractures, disc changes, and problems within the spinal canal that are not clearly visible on a standard X-ray.
Will I be able to drive after the test?
Most people can drive after a CT scan because no sedating medicine or IV contrast is typically used. If you receive medication for claustrophobia or another reason, ask the facility about transportation.
  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