Which artifact may be described as a duplicate image of structures across a strong reflector?

Which artifact may be described as a duplicate image of structures across a strong reflector?

• A. Mirror image artifact
• B. Partial volume artifact
• C. Refraction
• D. Comet tail

Answer: (A)

The idea being tested is that a strong reflector can act like a mirror in ultrasound imaging and create a duplicate image of structures on the opposite side. This happens when the sound wave travels to a structure, reflects off a very bright reflector, then returns to the transducer; the system interprets that path as if the structure were present at a single depth, producing a second, symmetrical copy across the reflector. That mirrored duplication is the mirror image artifact. Partial volume artifact arises from averaging signals within a single imaging voxel, causing blur or false edges; refraction artifact occurs when the sound beam bends at interfaces with different speeds, shifting structures laterally; comet tail is a dense, tapering reverberation behind a highly reflective object. The mirror image artifact best matches the description of a duplicate image across a strong reflector.

The idea being tested is that a strong reflector can act like a mirror in ultrasound imaging and create a duplicate image of structures on the opposite side. This happens when the sound wave travels to a structure, reflects off a very bright reflector, then returns to the transducer; the system interprets that path as if the structure were present at a single depth, producing a second, symmetrical copy across the reflector. That mirrored duplication is the mirror image artifact.

Partial volume artifact arises from averaging signals within a single imaging voxel, causing blur or false edges; refraction artifact occurs when the sound beam bends at interfaces with different speeds, shifting structures laterally; comet tail is a dense, tapering reverberation behind a highly reflective object. The mirror image artifact best matches the description of a duplicate image across a strong reflector.