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CT Angiography, Abdomen and Aorta — with Intravenous Contrast

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

A CT scan uses injected contrast to create detailed images of the abdominal aorta and nearby blood vessels.

Quick summary

["This CT angiogram helps evaluate the abdominal aorta and nearby arteries for narrowing, bulging, dissection, or bleeding."]

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

Key facts at a glance

LOINC
78037-9
Short code
CTA Abd Aort+ROves-Bl W contr IV
Synonyms
CTA Abd Aort+ROves-Bl 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-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?

CT angiography, or CTA, is an imaging test that uses multiple X-ray images and injected contrast to show the abdominal aorta and other blood vessels in the abdomen.

Why might I need this test?

A clinician may order this test to investigate an abdominal aortic aneurysm, a tear in the aortic wall, arterial narrowing, or symptoms suggesting a blood clot or internal bleeding.

How is the test performed?

You lie on a CT table while the scanner takes pictures. Intravenous contrast is usually injected through a vein in your arm, and the images are reviewed by a radiologist.

How do I prepare for the test?

Follow the facility's instructions, which may include avoiding food or drinks for a period. Tell the care team if you have had a reaction to contrast, have kidney disease, or are pregnant or may be pregnant.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Abnormal findings may include an abdominal aortic aneurysm, aortic dissection, narrowing or blockage of a vessel, or evidence of bleeding. The significance depends on the symptoms, medical history, and the specific findings shown in the images. Your clinician will explain the results and any recommended follow-up.

Short name

Abdominal Aorta CT Angiography

Frequently asked questions

Does this test use radiation?
Yes. CT angiography uses X-ray radiation and intravenous contrast to create detailed images of the blood vessels.
Is the abdominal aorta the same as the belly aorta?
Yes. The abdominal aorta is the main artery carrying blood from the heart through the abdomen.
What if I am allergic to contrast or have kidney disease?
Tell your clinician before the test. The care team can assess the risk and may take additional precautions or discuss an alternative imaging approach.
  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