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CT Urogram, Excretory Phase, With Intravenous Contrast

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

A CT urogram uses injected IV contrast and timed scans to evaluate the kidneys, ureters, and bladder, including the excretory phase.

Quick summary

["This scan creates detailed images of the urinary tract after IV contrast is given."]

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

Key facts at a glance

LOINC
30626-6
Short code
CT UE W contr IV
Synonyms
CT UE 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 CT urogram is a computed tomography scan that produces detailed pictures of the kidneys, ureters, and bladder. The excretory-phase images show contrast after it has passed through the kidneys into the urine.

Why might I need this test?

It may be used to evaluate kidney stones, urinary tract narrowing or obstruction, unexplained hydronephrosis, blood in the urine, or suspected abnormalities of the kidneys, ureters, or bladder.

How is the test performed?

You lie on a CT table while a technician takes several images. IV contrast is injected through a vein, and the scanner captures images at planned times, including the excretory phase.

How do I prepare for the test?

Follow the imaging center's instructions about eating, drinking, and medications. Tell the staff about kidney disease, previous contrast reactions, allergies, and pregnancy or possibility of pregnancy before receiving contrast.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

CT Urogram with IV Contrast

Frequently asked questions

Does this test use radiation?
Yes. CT scans use ionizing radiation, and IV contrast may also be administered.
Is IV contrast used during a CT urogram?
Yes. Contrast is given through a vein to highlight the urinary tract and show how contrast is excreted.
How long does the test take?
The exact time varies by facility and scan protocol. The exam includes several timed image sequences after contrast is injected.
  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