Final answer:
The latent image retention on a PSP decreases with time, and although the specific value after 8 hours is not provided, patterns from related data suggest a significant reduction from the original intensity.
Step-by-step explanation:
The question pertains to the retention of a latent image on a photostimulable phosphor plate (PSP) used in digital radiography, after a certain amount of time following exposure.
According to the information provided, the original latent image sharply decreases with time.
While specific data for PSP retention at 8 hours is not provided, we can infer from the examples that the ability of a substance to retain its properties - such as radioactivity or enzyme activity - diminishes over time.
Radioactive isotope decay and enzyme activity reduction data suggest that there will be a significant drop in the intensity of the original latent image in a PSP after 8 hours.