<unk> hy or arteriography is a medical imaging technique in which an X-ray picture is taken to visualize the inner opening (lumen) of blood filled structures, including 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<unk> h, or more commonly, an<unk> .
Angiogram
Magnetic resonance angiography
Venography
Computed tomography angiography
Thermography 
Lymphangiogram
CT angiography
Nuchal scan