CT Scan of the Kidneys with Intravenous Contrast
A CT scan uses X-rays and intravenous contrast to create detailed images of the kidneys and surrounding structures.
["This scan can help identify kidney abnormalities, including stones, obstruction, cysts, or masses."]
Key facts at a glance
- LOINC
- 46322-4
- Short code
- CT Kidney W contr IV
- Synonyms
- CT Kidney 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?
A kidney CT scan uses X-rays and computer technology to create detailed pictures of the kidneys. Intravenous contrast is injected into a vein to help improve the visibility of blood vessels, kidney tissue, and certain abnormalities.
Why might I need this test?
Your clinician may order this scan to investigate unexplained abdominal or flank pain, kidney stones, blood in the urine, urinary obstruction, or suspected kidney masses. It may also be used to assess kidney anatomy or guide medical treatment.
How is the test performed?
You will lie on a table that moves through the CT scanner while X-ray images are taken. Contrast is usually given through an intravenous line in your arm or hand, and the scan generally takes only a few minutes.
How do I prepare for the test?
Follow the imaging center's instructions, as fasting or other preparation may be required in some cases. Tell the care team if you are pregnant, may be pregnant, have kidney disease, have had a serious reaction to contrast, or take medicines such as metformin.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
The scan may reveal kidney stones, cysts, tumors, infection-related changes, hydronephrosis, or blocked urinary flow. Findings are interpreted together with symptoms, examination results, and other tests because an abnormal image does not identify the cause by itself. If intravenous contrast is used, your care team may also review kidney function to assess the risk of contrast-related complications.
Short name
Kidney CT with IV contrast
Frequently asked questions
Is a kidney CT with contrast the same as an ultrasound?
Is intravenous contrast safe for everyone?
Will I know the results immediately?
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