What contributes to stray light in fluoroscopy?

The contribution of stray light in fluoroscopy is primarily associated with the input phosphor stimulating inappropriate areas of the photocathode. In fluoroscopic systems, the input phosphor converts x-ray photons into visible light photons, which then strike the photocathode to produce an electron response. If the input phosphor is activated inappropriately or if there is any misalignment or scattering of light, it can lead to unwanted stimulation of the photocathode in areas that should not be reacting to light. This inappropriate stimulation can result in stray light artifacts which can degrade image quality and contrast.

Understanding how the input phosphor functions and its relationship with the photocathode is essential for navigating issues of image quality in fluoroscopy. Stray light diminishes the ability to accurately interpret the images captured during procedures.