Ring down artifact

Case contributed by Dr Matt A. Morgan


Urinary retention.

Patient Data

Age: 60-65Y
Gender: Male
Annotated image

The image is obtained from a transrectal ultrasound of the prostate. The patient has a Foley catheter in place and the irregular echogenic region in the center of the image is a small amount of air trapped in the catheter.

A tight reverberation artifact occurs behind the air bubles. The tight "rungs" on the "ladder" in this artifact corresponds with ring down artifact.

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Case information

rID: 48188
Published: 23rd Sep 2016
Last edited: 14th Aug 2019
System: Urogenital
Inclusion in quiz mode: Included

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