Reverberation artifact occurs when an ultrasound beam encounters two strong parallel reflectors.
When the ultrasound beam reflects back and forth between the reflectors ("revereberates"), the ultrasound transducer interprets the sound waves returning from the reverbration 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.
There are two subtypes of reverberation artifact:
- comet-tail artifact: a short train of reverberations from an echogenic focus which has strong parallel reflectors within it (e.g. cholesterol crystals in adenomyomatosis)
- ring down artifact: a type of continuous sound wave returning to the transducer, often caused by fluid trapped between gas bubbles
- 1. Schmidt G. Ultrasound. Thieme. ISBN:1588905527. Read it at Google Books - Find it at Amazon
- 2. Middleton WD, Kurtz AB. Ultrasound. Mosby. (2004) ISBN:0323017029. Read it at Google Books - Find it at Amazon
- 3. Feldman MK, Katyal S, Blackwood MS. US artifacts. Radiographics. 2009;29 (4): 1179-89. doi:10.1148/rg.294085199 - Pubmed citation