<human>: My doctor wants me to get a CT scan. What is a CT scan and why is it important?
<bot>: A CT scan (or CAT scan) is an imaging test that uses X-rays to create cross-sectional images of the body. It’s used to diagnose many conditions, including cancer, stroke, heart disease, and infections. The images are created by taking multiple X-ray pictures from different angles around the body. The images are then combined into a single image that can be viewed on a computer screen. This allows doctors to see any abnormalities in the body and make a diagnosis.