1) Medical test 
Angioscopy is a medical technique for visualizing the interior of blood vessels. In this technique, a flexible fiberoptic catheter inserted directly into an artery. It can be helpful in diagnosing e.g. arterial embolism. ...
The visualization with a microscope of the passage of substances (e.g., contrast media, radiopaque agents) through capillaries after intravenous injection. ... (12 Dec 1998) ... 
(an″ge-os´kә-pe) use of a fiberoptic angioscope to visualize the lumen of a blood vessel. visualization of capillary blood vessels with a special microscope (angioscope).
Type: Term Pronunciation: an′jē-os′kō-pē Definitions: 1. Visualization with a microscope of the passage of substances (contrast media, radiopaque agents) through capillaries after intravenous injection. 2. Visualization of the interior of blood vessels, especially the pulmonary arteries, using a fiberoptic catheter insert...
angioscopy The visualization of small vessels by an angioscope.