Final answer:
Depth perception is the ability of the scanner to visually discriminate between objects with similar physical density. It is our ability to perceive spatial relationships in three-dimensional space. This ability is particularly important in medical imaging.
Step-by-step explanation:
The ability of the scanner to visually discriminate between objects with similar physical density is called depth perception. It is our ability to perceive spatial relationships in three-dimensional space.
With depth perception, we can describe things as being in front, behind, above, below, or to the side of other things.
This ability is particularly important in the field of medical imaging, where scanners such as ultrasonic scans can produce density information based on the intensity of reflected sound, which is related to changes in density.