Computed Tomography Scan of the Abdomen and Abdominal Aorta Without Contrast
A CT scan that creates detailed images of the abdomen and abdominal aorta without using iodinated intravenous contrast.
["This CT scan evaluates the abdominal aorta and surrounding abdominal structures without intravenous contrast."]
Key facts at a glance
- LOINC
- 36431-5
- Short code
- CT Abd Aorta WO contr
- Synonyms
- CT Abd Aorta 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 CT scan of the abdomen and abdominal aorta, the main blood vessel carrying blood from the heart through the abdomen. It uses X-rays and computer processing to create cross-sectional images without iodinated IV contrast.
Why might I need this test?
A clinician may order this scan to evaluate the size and shape of the abdominal aorta, look for aortic wall calcification, or investigate symptoms such as sudden abdominal or back pain. It may also help identify certain bleeding, bowel, kidney, or other abdominal abnormalities.
How is the test performed?
You will lie on a padded table while a CT scanner rotates around you and takes X-ray images. The scan is generally painless and usually takes only a few minutes, although the total appointment may take longer.
How do I prepare for the test?
Follow the instructions provided by the imaging facility. You may be asked to fast for several hours, wear a hospital gown, and remove metal objects. Tell the care team if you are pregnant, may be pregnant, or have had a reaction to iodinated contrast, even though this particular scan is performed without contrast.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Abnormal findings may include enlargement or aneurysm of the abdominal aorta, aortic wall calcification, or evidence of bleeding or another abdominal condition. A noncontrast scan can provide useful information but may not show all vascular or soft-tissue details, so the radiologist may recommend additional imaging if needed.
Short name
CT abdomen and abdominal aorta without contrast
Frequently asked questions
Does this CT scan use contrast?
Is a CT scan painful?
When are the results available?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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