A chest CT, or computed tomography, is a diagnostic imaging technique that uses X-rays to create detailed cross-sectional images of the chest area. This imaging modality is commonly used to help diagnose and monitor a wide range of lung and chest conditions, including lung cancer, pneumonia, pulmonary embolism, and other abnormalities. Chest CT scans can provide detailed information about the structure of the lungs, airways, blood vessels, and surrounding tissues, aiding in the early detection and treatment of chest-related diseases. The images produced by a chest CT scan can also help guide medical procedures and evaluate the effectiveness of treatments.