<human>: My doctor wants me to get a CT scan. What is a CT scan and why is it important?
<bot>: A CT scan (Computed Tomography Scan) is a medical imaging test that uses X-rays to take pictures of the body. It is used to diagnose many different types of conditions, including cancer, stroke, heart disease, and infections. The images taken during a CT scan can help doctors see if there are any problems in the body, and they can use this information to plan treatment.