CT Scan of Lung Parenchyma with Intravenous Contrast

What is this test?

A lung CT with intravenous contrast is an imaging test that creates detailed pictures of the lung tissue using X-rays. Iodinated contrast given through a vein may help show blood vessels, inflammation, masses, and other abnormalities more clearly.

Why might I need this test?

Your clinician may order this test to investigate persistent cough, shortness of breath, fever, chest pain, or unexplained changes seen on a chest X-ray. It may also be used to evaluate lung nodules, infection, inflammation, emphysema, interstitial disease, fluid, or other structural changes.

How is the test performed?

You will lie on a table as a CT scanner takes X-ray images from different angles. If contrast is needed, it is usually injected into a vein in your arm, and you may be asked to hold your breath briefly during the scan. The procedure is generally painless, although the injection may cause a brief warm or cool sensation.

How do I prepare for the test?

Follow your clinician's instructions about eating, drinking, and medications. Tell the imaging team if you have had an allergic reaction to iodinated contrast, have kidney disease, are pregnant or may be pregnant, or have any other relevant medical conditions. The facility will explain whether fasting or other special preparation is required.