Which artifact appears most commonly with highly reflective objects?

Which artifact appears most commonly with highly reflective objects?

• A. Shadowing
• B. Reverberations
• C. Mirroring
• D. Enhancement

Answer: (A)

The effect being tested is shadowing: when a highly reflective object sits in the path of the ultrasound beam, most of the energy is reflected away or blocked, so the tissue behind it receives little to no sound and returns few echoes. This creates a dark, shadowy area beyond the object. In practice, dense structures like calcifications, stones, bone, or metal implants frequently cause shadowing because they strongly reflect or absorb the ultrasound energy, preventing penetration. Reverberation would show as multiple, evenly spaced echoes caused by the beam bouncing between two reflective surfaces. Mirroring produces a duplicated image across a strong reflector. Enhancement appears as increased brightness behind a weakly attenuating structure. These are different artifacts and don’t explain the common dark shadow that follows a highly reflective object.

The effect being tested is shadowing: when a highly reflective object sits in the path of the ultrasound beam, most of the energy is reflected away or blocked, so the tissue behind it receives little to no sound and returns few echoes. This creates a dark, shadowy area beyond the object. In practice, dense structures like calcifications, stones, bone, or metal implants frequently cause shadowing because they strongly reflect or absorb the ultrasound energy, preventing penetration.

Reverberation would show as multiple, evenly spaced echoes caused by the beam bouncing between two reflective surfaces. Mirroring produces a duplicated image across a strong reflector. Enhancement appears as increased brightness behind a weakly attenuating structure. These are different artifacts and don’t explain the common dark shadow that follows a highly reflective object.