What's the noun for angiogram? Here's the word you're looking for.
angiography
(medicine) A medicalimaging technique in which an X-ray image is taken to visualize the inside of blood vessels and organs of the body, with particular interest in the arteries, veins and the heart chambers.
“We are a regional leader in offering Virtual Colonoscopy in addition to special examinations including CT Angio especially Coronary artery studies, and CT Urography.”