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CT aortogram

A CT aortogram is a ct test of the aorta. It shows aortic aneurysm or dissection. Typical effective dose 10 to 20 mSv, similar to about 3 to 7 years of natural background radiation (about 3 mSv a year).

General health information, not a diagnosis. In an emergency, call 102. Always consult a qualified health professional.

SmartAnswer by DigiNepal SI

A CT aortogram is a medical imaging test that visualizes the aorta, the largest artery in the body. It helps diagnose conditions such as aortic aneurysm or dissection. The typical effective radiation dose is 10 to 20 mSv, which is similar to about 3 to 7 years of natural background radiation (about 3 mSv per year). The test is usually done when someone experiences tearing chest or back pain, indicating an emergency situation. Before the test, it's important to remove metal objects and fast for a few hours if contrast material is used. The radiation exposure is generally safe, but the benefit usually outweighs the small risk. The test takes about 10 minutes and results must be interpreted by a qualified health worker.

Sources: SI health summary (own words); decoder imaging pack; RadiologyInfo.org and MedlinePlus as references only

What it shows

Aortic aneurysm or dissection.

Why it is done

Tearing chest or back pain (emergency).

Preparation

Remove metal objects. If contrast is used you may need to fast for a few hours; tell staff about allergies, kidney disease, diabetes medicines (metformin) or pregnancy.

Radiation & safety

Typical effective dose 10 to 20 mSv, similar to about 3 to 7 years of natural background radiation (about 3 mSv a year). Tell staff if you are or might be pregnant; the benefit usually outweighs the small risk, and shielding or alternatives can be considered.

How long it takes

10 minutes. General information, not a diagnosis. Results must be interpreted by a qualified health worker.

Sample type

CT

Consult a doctor to interpret results — a single test does not make a diagnosis.

Related conditions

entry-health-condition-hypertension

Where to get this near you

Care near you

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Common questions

What does a ct aortogram show?
Aortic aneurysm or dissection.

Why is a ct aortogram done?
Tearing chest or back pain (emergency).

How do I prepare for a ct aortogram?
Remove metal objects. If contrast is used you may need to fast for a few hours; tell staff about allergies, kidney disease, diabetes medicines (metformin) or pregnancy.

Does a ct aortogram use radiation?
Typical effective dose 10 to 20 mSv, similar to about 3 to 7 years of natural background radiation (about 3 mSv a year). Tell staff if you are or might be pregnant; the benefit usually outweighs the small risk, and shielding or alternatives can be considered.

How long does a ct aortogram take?
10 minutes

Why is CT aortogram done?
Tearing chest or back pain (emergency).

How do I prepare for CT aortogram?
Remove metal objects. If contrast is used you may need to fast for a few hours; tell staff about allergies, kidney disease, diabetes medicines (metformin) or pregnancy.

Is CT aortogram safe in pregnancy?
Typical effective dose 10 to 20 mSv, similar to about 3 to 7 years of natural background radiation (about 3 mSv a year). Tell staff if you are or might be pregnant; the benefit usually outweighs the small risk, and shielding or alternatives can be considered.

SI text CC BY 4.0; RadiologyInfo.org (ACR/RSNA) and MedlinePlus linked as references only, no text copied.

Sources: SI health summary (own words); decoder imaging pack; RadiologyInfo.org and MedlinePlus as references only

Emergency — call102