Angiography

Angiography or arteriography is a medical imaging technique in which an X-ray image is taken to visualize the inside or (lumen) of blood vessles and organs of the body. With particular interest in the arteries, veins and the heart chambers.
Its name comes from the Greek words angeion, "vessel", and graphien, "to write or record". The X-ray film or image of the blood vessels is called an angiograph, or more commonly, an angiogram.