Question: what is the difference between a ct scan and a cta?
Answer: A CT scan works similar to an x-ray. ... CT angiogram (CTA) can be used to view arteries and veins. Contrast dye injected into the bloodstream helps the computer "see" the vessels. CTA images can be 3-D reconstructed so that the cerebral vessels and accompanying pathology can be rotated and viewed from all angles.