As photoelectrons strike the output phosphor of the image intensifier, they are converted into which of the following?

When photoelectrons strike the output phosphor of the image intensifier, their energy is converted into light photons. This process occurs in the image intensifier, which is a crucial component in fluoroscopy. The primary function of the output phosphor is to amplify the light signal generated by the incoming photoelectrons, which have been produced by the initial interaction of X-rays with the input phosphor.

The image intensifier works by first converting the X-ray photons into visible light through the input phosphor layer. Next, the light is converted into photoelectrons, which are accelerated towards the output phosphor. Upon hitting the output phosphor, the kinetic energy of these photoelectrons is transformed back into visible light photons, resulting in a much brighter and clearer image that can be viewed on a monitor.

This conversion to light photons enhances the visibility of the image, making it easier for medical professionals to analyze the fluoroscopic images. In contrast, electric signals, X-rays, and gamma rays are not products of this specific interaction at the output phosphor.