Definition: The word "angiograph" refers to an instrument used for imaging blood vessels, commonly known as catheters inserted through the skin into the body. It's essential for diagnosing various conditions related to blood flow or clotting in the brain, spinal cord, heart, and other parts of the body. Detailed definition includes: - Angiography: A diagnostic procedure where an instrument is inserted through the skin into a specific part of the body (such as a vein) to study its blood vessels for abnormalities. - Catheter: An endoscope-like device used in angiography that carries a small camera and tubes to observe blood flow.