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The ring‐down artifact.
Author(s) -
Avruch L,
Cooperberg P L
Publication year - 1985
Publication title -
journal of ultrasound in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 91
eISSN - 1550-9613
pISSN - 0278-4297
DOI - 10.7863/jum.1985.4.1.21
Subject(s) - artifact (error) , medicine , french horn , streak , ring (chemistry) , pulse (music) , acoustics , transducer , ultrasonic sensor , optics , physics , radiology , computer vision , chemistry , organic chemistry , detector , computer science
"Ring‐down" is an ultrasound artifact that appears as a solid streak or a series of parallel bands radiating away from abdominal gas collections. Using an in vitro system of bubbles in water or gelatin, it was found that the ring‐down artifact originated from the center of a cluster of four bubbles (bubble tetrahedron), three on top and one nestled beneath. Entrapped between the bubbles is a horn‐ or bugle‐shaped fluid collection that we theorize emits a continuous sound wave back to the transducer when struck by an ultrasound pulse. Electronic processing by the scanner converts this continuous sound wave into the series of bands seen in the ring‐down artifact.