angiographer

noun

an·​gi·​og·​ra·​pher ˌan-jē-ˈäg-rə-fər 

: a physician or a certified X-ray technician who performs angiography and interprets angiograms

Angiographers know where the coronary artery openings are simply by having been there so many times.

—John Stone, The New York Times

a certified retinal angiographer