A CT (Computed Tomography) scan uses special X-ray equipment and a computer to create detailed, cross-sectional "slice" images of the body, showing bones, soft tissues, and blood vessels with more clarity than standard X-rays, helping doctors diagnose injuries, diseases (like cancer, strokes, clots), plan treatments, and monitor conditions by taking multiple X-ray images from different angles. The procedure involves lying on a table that moves through a donut-shaped scanner, sometimes with contrast dye for better visibility, and takes only minutes, though preparation and waiting can extend the visit.