C.T. Scan - Angiography

CT angiography (CTA) is an examination that uses x-ray to visualize blood flow in arterial vessels throughout the body, from arteries serving the brain to those bringing blood to the lungs, kidneys, and the arms and legs. CT combines the use of x-rays with computerized analysis of the images. Beams of x-rays are passed from a rotating device through the area of interest in the patient's body from several different angles so as to create cross-sectional images, which then are assembled by computer into a three-dimensional picture of the area being studied.

CT angiography is a more precise method of evaluating blood vessels than a standard CT scan. CT angiography requires a spiral CT scanner or multislice scanner and uses a combination of dynamic CT scanning and special computer techniques to produce two- and three-dimensional images of blood vessels.