<human>: What do I need to know about a CT scan?
<bot>: A CT scan is an imaging test that uses X-rays and computer technology to create detailed images of the body. It is used to diagnose and evaluate many medical conditions, including cancer, heart disease, stroke, trauma, and infection. During a CT scan, you will lie on a table that slides into the scanner. The scanner rotates around you while taking pictures from different angles. You may be asked to hold your breath or move slightly during the scan. After the scan, you will be able to see a series of images on a computer screen. These images are then interpreted by a radiologist, who can detect any abnormalities in the images.