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Computed Tomography Scan of the Chest and Abdomen Without Contrast

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

A CT scan that creates detailed images of the chest and abdomen without using intravenous contrast dye.

Quick summary

["This CT scan evaluates structures in the chest and abdomen and does not require contrast dye."]

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

Key facts at a glance

LOINC
42276-6
Short code
CT Chest+Abd WO contr
Synonyms
CT Chest+Abd 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 (CT) scan that takes detailed X-ray images of the chest and abdomen. It is performed without intravenous contrast dye.

Why might I need this test?

A physician may order this scan to investigate unexplained symptoms, evaluate an injury, or look for abnormalities involving the lungs, chest organs, abdominal organs, or nearby tissues.

How is the test performed?

You will lie on a motorized table while a CT scanner rotates around you and takes many X-ray images. The procedure is generally painless and usually takes only a few minutes, although the total visit may take longer.

How do I prepare for the test?

Wear clothing without metal fasteners and tell the care team about any metal, medication, or pregnancy-related concerns. Because no contrast dye is used, fasting is usually unnecessary unless your imaging center provides different instructions.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

CT Chest and Abdomen Without Contrast

Frequently asked questions

Will I receive contrast dye for this scan?
No. This test is performed without intravenous contrast dye, although some facilities use oral contrast for the abdomen if it is specifically ordered.
Is a CT scan painful?
The scan itself is usually painless. You may be asked to remain still and briefly hold your breath while the images are taken.
Are there risks from a CT scan without contrast?
CT scans use ionizing radiation, so the dose is kept as low as reasonably possible. Tell the care team if you are pregnant or may be pregnant before the scan.
  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