SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
The first angiogram. View of the first angiogram showing the hand's blood vessels. This was made in 1896 in Vienna soon after the discovery of X-rays. The angiogram is of the hand of a corpse, the blood vessels are clearly defined. Angiography is a branch of medical diagnostic X-ray photography. A chemical which is opaque to X-rays is injected into the blood vessels. This will make the blood vessels visible in the X-ray photograph. Angiography can be used to show narrowed coronary arteries and defective heart valves.
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