When a fluoroscope using a vidicon camera moves rapidly, the image distortion is called what?

When a fluoroscope utilizing a vidicon camera moves rapidly, image distortion resulting from this rapid motion is referred to as "lag." This phenomenon occurs because the electronics inside the vidicon camera may not be able to process the incoming images quickly enough to keep pace with the motion. As a result, the image can appear smeared or distorted, as the previous frame may still be partially visible while the new image is being captured. This lag effect is particularly pronounced in situations where the speed of motion is significant, leading to a mismatch between the time it takes to capture and display the images.

In contrast, the other terms have different implications in the context of imaging. Vignetting refers to the reduction of an image's brightness or saturation at the periphery compared to the center, which does not result from motion but rather from lens or optical characteristics. Mottle describes a type of graininess or pixelation due to insufficient exposure, while noise generally refers to random variations in the signal that can obscure the image quality but is distinct from the visual distortions seen with rapid motion.