Computed Tomography (CT) Abdomen and Pelvis with and without Intravenous Contrast

What is this test?

This is a CT imaging procedure, not a blood test. X-ray images are taken of the abdomen and pelvis, first without contrast and then after intravenous (IV) contrast is given. The two sets of images help show organs, blood vessels, masses, stones, fluid collections, and other abnormalities more clearly.

Why might I need this test?

A clinician may order this scan to investigate unexplained abdominal or pelvic pain, swelling, fever, injury, kidney stones, infection, suspected tumors, or problems involving blood vessels. It may also be used to monitor certain conditions or plan treatment or surgery.

How is the test performed?

You will lie on a moving table inside the CT scanner. The scanner takes several sets of pictures. If contrast is part of your study, an IV line may be placed in your arm or hand to administer the contrast, followed by additional images. The scan usually takes a relatively short time, and a radiologist interprets the images.

How do I prepare for the test?

Follow the imaging center's instructions about eating, drinking, and medicines. Tell the care team if you have previously reacted to contrast, have kidney disease, are pregnant or might be pregnant, or take medicines that may interact with contrast. Do not stop any medicine unless your clinician specifically tells you to do so.