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CT Abdomen and Pelvis, With and Without IV Contrast

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

A CT scan of the abdomen and pelvis performed with and without injected contrast to evaluate organs, blood vessels, and other structures.

Quick summary

["This scan uses CT images, sometimes with injected contrast, to help find problems in the abdomen and pelvis."]

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

Key facts at a glance

LOINC
94687-1
Short code
CTA Abd ves+Pelvis ves WO contr
Synonyms
CTA Abd ves+Pelvis ves 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-angio
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 CT scan that creates detailed cross-sectional images of the abdomen and pelvis. It may include images taken before and after intravenous contrast, a dye that helps highlight blood vessels and certain tissues.

Why might I need this test?

It may be ordered to evaluate unexplained pain or swelling, infection, stones, tumors, bowel problems, internal bleeding, or conditions affecting the abdominal and pelvic blood vessels.

How is the test performed?

You lie on a table that moves through a CT scanner. X-ray images are taken, and if contrast is used, it is given through a vein in your arm. The scan usually takes a relatively short time.

How do I prepare for the test?

Follow the instructions provided by the imaging center. If contrast will be used, tell the care team about kidney disease, severe allergy to iodinated contrast, or any prior contrast reaction. Fasting may be requested, but it is not always necessary.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Abnormal findings may indicate conditions involving the digestive, urinary, reproductive, vascular, or skeletal structures of the abdomen and pelvis. The specific meaning depends on the images and the clinical question, so results should be reviewed with the ordering clinician or radiologist.

Short name

CT Abdomen/Pelvis With and Without Contrast

Frequently asked questions

Does this test use radiation?
Yes. CT imaging uses a small amount of ionizing radiation, but the scan is generally brief and is performed only when the expected information is considered useful.
Why are some images taken without contrast and others with contrast?
Images without contrast can show stones, bleeding, and certain tissue or bone findings. Contrast-enhanced images can provide more detail about blood vessels and soft organs.
Can I have this test if I am allergic to contrast?
Tell the imaging center about any prior contrast reaction before the appointment. The care team can assess the allergy, determine whether contrast is necessary, and arrange precautions if needed.
  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