What is the definition or description of: angiography?

Arteries: It is an imaging technique to determine the anatomy of the arteries.

Blood Dye Picture: Angio=blood, graphy=image; pictures which show an image, still or motion, of dye added into the blood, so that a shadow of the dye/blood column shows on images. Artery ds=an accumulation of white blood cells, living & dead, within artery walls. Arteries enlarge/not narrow in response. Wall not seen in angiogram images & only larger openings visible. Stenosis due to plaque rupture&clots in opening.

Angiography: encompasses several medical imaging tests that visualize the anatomy and pathology of blood vessels. Standard angiography involves catheterizing a vessel and injecting contrast under X-ray visualization. Less invasive angiographic techniques include MR angiography and CT angiography .