Computed Tomography (CT) Scan of a Joint with Contrast

What is this test?

A joint CT scan uses X-rays and a computer to create detailed images of a joint and nearby bone and soft tissue. Contrast material may be given through a vein or placed into the joint, depending on the specific examination.

Why might I need this test?

The test may be ordered to evaluate persistent joint pain, swelling, injury, suspected fracture, infection, arthritis, a bone lesion, or abnormalities involving nearby tendons, ligaments, and other tissues.

How is the test performed?

You will lie on a table while the scanner takes X-ray images from different angles. If intravenous contrast is used, it is usually given through a small IV line; contrast placed directly in the joint requires a joint injection. The procedure generally takes a short time but may be uncomfortable if you must remain still.

How do I prepare for the test?

Follow the instructions provided by the imaging center. You may need to avoid eating or drinking beforehand if IV contrast will be used, and you should tell the care team about kidney disease, prior contrast reactions, allergies, pregnancy or breastfeeding, and medications such as metformin. Remove jewelry and other metal objects near the area being scanned.