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Computed Tomography (CT) Examination With Intravenous Contrast

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

A CT scan that uses X-rays and intravenous contrast to create detailed images of internal organs, tissues, and blood vessels.

Quick summary

["This CT scan uses intravenous contrast to improve the visibility of organs, blood vessels, and other internal structures."]

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

Key facts at a glance

LOINC
26185-9
Short code
CT Extr-L W contr IV
Synonyms
CT Extr-L 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?

Computed tomography, or CT, uses X-rays and a computer to create cross-sectional images of the body. Intravenous contrast is injected into a vein to help certain tissues, blood vessels, and abnormal areas appear more clearly.

Why might I need this test?

CT with intravenous contrast may help evaluate unexplained symptoms, injury, infection, inflammation, bleeding, obstruction, tumors, or blood clots. The body area scanned depends on the specific examination ordered.

How is the test performed?

You will lie on a movable table while a CT scanner rotates around you and takes images. An IV line is placed in a vein, and contrast is injected, usually followed by a brief period of lying still while the images are obtained.

How do I prepare for the test?

Follow the imaging center's instructions about eating, drinking, and medications. Tell the care team about any contrast allergy, prior imaging reaction, kidney disease, pregnancy possibility, or medicines that require special precautions, such as metformin.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

CT with IV contrast

Frequently asked questions

Is a CT scan with IV contrast the same as a CT scan without contrast?
No. IV contrast can improve the detail seen in certain tissues and blood vessels, while a noncontrast CT may be sufficient for some examinations such as many bone or kidney-stone studies.
Will I feel the contrast injection?
You may feel a brief warm or cool sensation, pressure at the injection site, or a metallic taste. Tell the technologist immediately if you experience significant pain, dizziness, itching, or difficulty breathing.
Do I need to arrange transportation after the test?
Most people can leave normally, but you may be observed briefly after contrast is given. Arrange transportation if you were sedated, have symptoms that could make driving unsafe, or the imaging center specifically instructs you to do so.
  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