Acoustic enhancement

Last revised by Kajanan Nithiyananthan on 7 Jun 2024

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

ADVERTISEMENT: Supporters see fewer/no ads

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.