What is the purpose of the output phosphor in a fluoroscopy system?

The output phosphor in a fluoroscopy system plays a crucial role in the imaging process by converting the incoming electron signal into visible light. After the x-rays strike the input phosphor, which typically converts them into a pattern of electrons, these electrons are directed toward the output phosphor. The output phosphor is designed specifically to emit light photons when these electrons hit its surface. This emitted light is what is ultimately viewed by the radiologist or physician, allowing for real-time observations of the internal structures of the patient during the fluoroscopic procedure.

The effectiveness of the output phosphor in generating sufficient light allows for clear and detailed visualization, which is essential for accurate diagnosis and treatment. Therefore, the primary purpose of the output phosphor, to emit light photons for viewing, is integral to the functioning of the entire fluoroscopy system.