Which part of the image intensifier is usually linked with the output phosphor?

The correct choice relates to the output phosphor's function in the image intensifier system. The output phosphor is typically paired with devices that convert the image produced into a visible format. In this context, the charge-coupled device (CCD) plays a significant role in transforming the emitted electrons from the output phosphor into a digital signal that can be further processed or displayed.

The other components of the image intensifier, such as the photocathode and input phosphor, have distinct functions. The photocathode is responsible for converting incoming light into electrons, while the input phosphor absorbs x-rays and converts them into light, thereby initiating the image intensification process. The electron lens helps focus and direct the emitted electrons toward the output phosphor, but it does not serve as the output format itself. Therefore, the connection between the output phosphor and the charge-coupled device is pivotal in the final imaging process within the system.