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Computed Tomography (CT) Scan of the Lumbar Spine Without Contrast

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

A CT scan uses X-rays to create detailed images of the lower spine. This version is performed without injected contrast material.

Quick summary

["This scan provides detailed images of the lumbar spine to evaluate bones, discs, and spinal canal without IV contrast."]

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

Key facts at a glance

LOINC
30620-9
Short code
CT L-spine WO contr
Synonyms
CT L-spine 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 lumbar spine CT is an X-ray-based imaging test that creates detailed pictures of the lower back, including the vertebrae, spinal discs, and spinal canal. It is performed without injected contrast material.

Why might I need this test?

Your clinician may order this scan to evaluate persistent back or leg pain, spinal trauma, a suspected fracture, disc disease, nerve compression, infection, or a spinal mass. It may also be used to clarify findings from an X-ray or MRI.

How is the test performed?

You will lie on a table that moves through a CT scanner while X-ray images are taken from different angles. The scan is generally painless and usually takes less than 30 minutes.

How do I prepare for the test?

No special preparation is usually required for a CT scan without contrast. Remove metal objects, tell the imaging staff if you are pregnant or may be pregnant, and inform them of any prior reaction to contrast material.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Lumbar spine CT without contrast

Frequently asked questions

Does this CT scan use contrast material?
No. This is a noncontrast CT scan, so no contrast material is injected through a vein.
Is a lumbar spine CT the same as a routine spine X-ray?
No. CT provides more detailed cross-sectional images than a standard X-ray and can show bone, disc, and spinal canal abnormalities more clearly.
Will I need someone to drive me home?
Usually not, because the scan does not use sedation and you can generally resume normal activities immediately. Follow your clinician's instructions if you have other conditions or receive sedating medication.
  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