CT scanning, or computed tomography scanning, is a medical imaging technique that uses X-rays to create detailed cross-sectional images of the body. It combines multiple X-ray images taken from different angles and uses computer processing to produce comprehensive views of internal structures, such as organs and tissues. This non-invasive procedure helps doctors diagnose various conditions, including tumors, internal injuries, and infections. CT scans are commonly used in emergency medicine and routine check-ups, providing valuable information that aids in treatment planning and monitoring the effectiveness of therapies.