CT angiography is a medical imaging technique that uses computed tomography (CT) technology to visualize blood vessels in various parts of the body. It is a non-invasive method that produces detailed images of blood vessels, allowing doctors to diagnose and evaluate a wide range of vascular conditions, such as aneurysms, stenosis, and malformations. CT angiography is often used to assess blood flow, detect blockages, and plan for surgical interventions or treatments. It is particularly useful in evaluating the blood vessels of the brain, heart, lungs, abdomen, and extremities.