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CT Chest Without Contrast and Coronary CT Angiography with Intravenous Contrast

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

Chest CT imaging without contrast combined with contrast-enhanced CT angiography of the coronary arteries.

Quick summary

This scan evaluates the chest and uses contrast-enhanced imaging to assess the coronary arteries supplying the heart.

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

Key facts at a glance

LOINC
87847-0
Short code
CT Chest WO + CTA Coronary aa W contr IV
Synonyms
CT Chest WO + CTA Coronary aa 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-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?

This is a CT imaging examination with two parts. The chest is scanned without contrast, and the coronary arteries are examined with intravenous contrast using coronary CT angiography.

Why might I need this test?

The chest CT can help evaluate structures in the chest, while coronary CT angiography is used to assess the heart's coronary arteries. It may be ordered to investigate chest symptoms, evaluate heart-related findings, or examine blood vessels and nearby structures.

How is the test performed?

You lie on a CT scanner table while the machine takes X-ray images from different angles. Intravenous contrast may be injected through a vein in your arm for the coronary artery scan; you may be asked to hold your breath briefly.

How do I prepare for the test?

Follow the imaging center's instructions, including any restrictions on eating, drinking, and caffeine. Tell the staff if you have kidney disease, prior contrast reactions, allergies, pregnancy, or take metformin, because these factors may affect contrast use or preparation.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Abnormal findings may involve the lungs, chest organs, or coronary arteries, such as narrowing, plaque, or other structural changes. Results are interpreted together with symptoms, medical history, and other tests, and a radiologist may recommend additional evaluation or follow-up.

Short name

Chest CT and Coronary CT Angiography

Frequently asked questions

Does this test use contrast?
The coronary artery portion uses intravenous contrast, while the chest portion is specified as being performed without contrast. The imaging center will confirm the exact protocol before the scan.
Is CT coronary angiography the same as a heart catheterization?
No. CT coronary angiography uses X-ray imaging and injected contrast to examine the coronary arteries without inserting a catheter into the heart.
Will I need blood work before the scan?
The imaging center may check kidney function before contrast is given, particularly if you have kidney disease or other risk factors. Preparation and any medication instructions should be confirmed when the appointment is scheduled.
  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