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CTA (Computed Tomography Angiography) uses CT technology to visualize blood flow in arterial vessels throughout the body. Areas often studied include arteries serving the brain, the lung, the kidneys, the arms and the legs.
Beams of x-rays are passed from the scanner 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 of the body that is being studied.
CTA can be used to detect narrowing or obstruction of blood vessels as well as aneurysms and embolism. CT and CTA can be combined with PET scans to create studies called PET Fusion scans. PET Fusion is discussed on another procedure page.
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