CT Pulmonary Angiography with Intravenous Contrast

What is this test?

CT pulmonary angiography is an imaging test that creates detailed pictures of the pulmonary arteries, which carry blood from the heart to the lungs. Intravenous contrast is given through a vein to help make these blood vessels easier to see.

Why might I need this test?

It is commonly used when a pulmonary embolism is suspected, particularly after symptoms such as sudden shortness of breath, chest pain, coughing blood, a rapid heartbeat, or swelling in one leg. It may also be used to evaluate other abnormalities of the pulmonary blood vessels.

How is the test performed?

You lie on a CT scanner while X-ray images are taken from different angles. A clinician or technologist gives intravenous contrast through a vein, and the scan is timed to capture contrast flowing through the pulmonary arteries. The procedure is generally painless, although the injection may cause a brief warm or flushing sensation.

How do I prepare for the test?

Follow the imaging center's instructions, as fasting or medication adjustments may be required in some cases. Tell the care team about any previous contrast reaction, severe allergy, kidney disease, pregnancy possibility, or implanted devices before receiving contrast.