Skip to content

CT Angiography (CTA) of the Chest and Abdomen — Intravenous Contrast

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

A CT scan that uses intravenous contrast and specialized images to evaluate blood vessels in the chest and abdomen.

Quick summary

["This test uses contrast-enhanced CT images to help assess blood vessels and related structures in the chest and abdomen."]

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

Key facts at a glance

LOINC
86982-6
Short code
CTA Chest+Abd ves W contr IV
Synonyms
CTA Chest+Abd ves 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 X-rays and intravenous contrast to create detailed pictures of blood vessels. The scan covers the chest and abdomen and may be used to evaluate arteries or other vascular structures.

Why might I need this test?

A clinician may order this test to investigate narrowing, blockage, enlargement, or other abnormalities of blood vessels. It may also be used to evaluate conditions involving the aorta or to guide treatment planning.

How is the test performed?

You will lie on a table that moves through a CT scanner. IV contrast is usually injected through a vein, and the scanner takes multiple images while the contrast circulates through your body.

How do I prepare for the test?

Follow the instructions provided by the imaging center, including any fasting or medication guidance. Tell the care team about prior contrast reactions, kidney disease, pregnancy or possible pregnancy, and other relevant medical conditions before the scan.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

CTA Chest and Abdomen with IV Contrast

Frequently asked questions

Is this the same as a routine CT scan?
It is a form of CT imaging that uses intravenous contrast and timing designed to show blood vessels more clearly. The exact protocol may vary based on the condition being evaluated.
Will I need an IV line?
Usually, yes. Contrast is commonly injected through a vein in your arm or another suitable location.
What should I do if I have reacted to contrast before?
Tell the imaging center and ordering clinician before the appointment. They can review the prior reaction and determine what precautions or monitoring are 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