Computerized tomographic angiography, also called CT angiography or CTA, is a test that creates detailed images of the blood vessels in your body.
During a CT scan, X-rays and computers create images that show pictures of inside your body. Then through an intravenous line or IV, a contrast agent is injected into a vein in your arm to help visualize the blood vessels and the blood flow within them. When the IV contrast is used to visualize your arteries, it is known as an arteriogram or CTA. Your child’s doctor may order CT angiography to help diagnose a narrowing or obstruction of the arteries, an aneurysm, deep vein thrombosis, pulmonary embolism, or another vascular condition.