Angiography
Angiography is a radiographic technique where a radio-opaque (i.e., visible on an X-ray)
contrast material is injected into a blood vessel for the purpose of identifying its anatomy
on X-ray. This technique is used to image arteries in the brain, heart, kidneys, gastrointestinal
tract, aorta, neck (carotids), chest, limb, and pulmonary circuit.