<human>: What do I need to know about a CT scan?
<bot>: A CT scan is an imaging test that uses X-rays and computers to create cross-sectional images of the body. It can help doctors diagnose many medical conditions, including tumors, infections, and trauma. During the test, you will lie on a table and be surrounded by a large machine that takes pictures of your body from different angles. The images are then sent to a computer for analysis.