Acoustic enhancement
Last revised by Tariq Walizai on 19 Jul 2024
Citation, DOI, disclosures and article data
Citation:
Morovati P, Walizai T, Nithiyananthan K, et al. Acoustic enhancement. Reference article, Radiopaedia.org (Accessed on 08 Oct 2024) https://doi.org/10.53347/rID-40009
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rID:
40009
Article created:
2 Oct 2015,
Peyman Morovati
Disclosures:
At the time the article was created Peyman Morovati had no recorded disclosures.
View Peyman Morovati's current disclosures
Last revised:
19 Jul 2024,
Tariq Walizai
Disclosures:
At the time the article was last revised Tariq Walizai had no financial relationships to ineligible companies to disclose.
View Tariq Walizai's current disclosures
Revisions:
10 times, by
10 contributors -
see full revision history and disclosures
Sections:
Synonyms:
- Enhanced through transmission
- Posterior enhancement
- Posterior acoustic enhancement
Acoustic enhancement also called posterior enhancement or enhanced through transmission, refers to the increased echoes deep to structures that transmit sound exceptionally well 1.
This is characteristic of fluid-filled structures such as cysts, the urinary bladder and the gallbladder. For a 1 MHz beam, the attenuation coefficient of water is approximately 2000 times less than soft tissue 2, therefore fluid attenuates sound much less than the surrounding tissue. The time gain compensation (TGC) overcompensates through the fluid-filled structure causing deeper tissues to be brighter. Simply it is seen as increased echogenicity (whiteness) posterior to the cystic area. The presence of acoustic enhancement aids in the identification of cystic masses but some solid masses, especially lymphoma, may also show acoustic enhancement posteriorly.
See also
Quiz questions
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References
- 1. Abu-Zidan FM, Hefny AF, Corr P. Clinical ultrasound physics. J Emerg Trauma Shock. 2012;4 (4): 501-3. Free text at pubmed - Pubmed citation
- 2. Jerrold T. Bushberg, John M. Boone. The Essential Physics of Medical Imaging. (2011) ISBN: 9780781780575 - Google Books
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