Digital cineradiography is used during cardiac catheterization procedures. It consists of three main components: 1) an automatic brightness control that adjusts exposure based on tissue density, 2) a beam-splitting mirror that directs images to a monitor and cine camera simultaneously, and 3) a cine camera that films the angiographic images but increases patient radiation dose. During cardiac catheterization, a catheter is inserted and contrast dye is used to create X-ray videos of the heart valves, arteries, and chambers at various frame rates to diagnose and treat cardiovascular conditions.