Reverberation artifact

Reverberation artifact occurs when an ultrasound beam encounters two strong parallel reflectors.

When the ultrasound beam reflects back and forth between the reflectors ("reverberates"), the ultrasound transducer interprets the sound waves returning as deeper structures since it took longer for the wave to return to the transducer.

Reverberation artifacts can be improved by changing the angle of insonation so that reverberation between strong parallel reflectors cannot occur.

Comet-tail artifact is a specific type of reverberation artifact. This results a short train of reverberations from an echogenic focus which has strong parallel reflectors within it (e.g. cholesterol crystals in adenomyomatosis).

Practical points

Although sometimes grouped with reverberation due to similar appearances, ring down artifact does not arise from the same mechanism and should be considered separately 3.

See also

Imaging technology

Article information

rID: 31989
Synonyms or Alternate Spellings:
  • Reverberation artefact

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Cases and figures

  • Figure 1
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  • Case 1 : from a glass foreign body
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  • Case 2: from a metal foreign body
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  • Case 3 : Coin in stomach
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  • Case 4: gallbladder adenomyomatosis
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  • Case 5: intrauterine contraceptive device with pregnancy on top
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