CT Scan of an Extremity Without Contrast

What is this test?

A CT scan uses X-rays and a computer to create cross-sectional images of the body. In this examination, an affected arm or leg is imaged without injected iodinated contrast.

Why might I need this test?

A CT scan of an extremity may be ordered to evaluate a fracture, infection, tumor, swelling, or another problem involving a bone, joint, muscle, or other soft tissue. It can also help guide treatment or determine whether surgery is needed.

How is the test performed?

You will lie on a padded table while an X-ray machine rotates around the area being examined. The scan is generally painless and usually takes a short amount of time, although the exact duration depends on the body part and imaging protocol.

How do I prepare for the test?

For a scan without injected contrast, fasting is usually not required. Remove metal objects and loose items from the area if instructed, and tell the imaging staff if you are pregnant or may be pregnant. Follow the facility's specific instructions because some CT examinations use contrast or additional imaging.