What does the output screen of an image intensifier convert?

The output screen of an image intensifier is responsible for converting electrons into light. In the process of fluoroscopy, X-rays first hit a photocathode, which then generates electrons in response to the X-ray exposure. These electrons are subsequently accelerated toward the output screen, where they collide with a phosphorescent material. This collision produces visible light, which is then viewed on a monitor or other display system.

The correct answer highlights the essential function of the output screen in the image intensification process, focusing on its role in converting the energy from accelerated electrons into the visible light that enables imaging. Understanding this process is crucial for those working with fluoroscopic equipment, as it underlines the chain of events necessary for effective image generation in medical imaging applications.