Essential Functions: Operates diagnostic imaging equipment to produce contrast enhanced radiographs of heart and cardiovascular system (Angio cardiograms), during cardiac catheterization, to aid physician in diagnostic evaluation and treatment: positions and immobilizes patient on examining table, using head and shoulder braces and following specified protocols. Observes gauges, recorder, and video screens of multichannel data analysis system that indicates blood pressure, cardiac output, and respiration, during imaging of cardiovascular system.