Computed tomography (CT) is a medical imaging technique that uses X-ray technology to create detailed cross-sectional images of the body. It is commonly used to diagnose and monitor a wide range of medical conditions, including cancer, heart disease, and trauma. CT scans are non-invasive and provide high-resolution images that can reveal abnormal growths, internal bleeding, and other issues within the body. CT is often used in combination with other imaging techniques, such as MRI and ultrasound, to provide a comprehensive view of a patient's condition.