PT  - JOURNAL ARTICLE
AU  - C-L Tsai
AU  - H-P Wang
AU  - W-C Lien
AU  - C-C Chen
AU  - T-I Lai
AU  - W-J Chen
TI  - Ring down artefacts on abdominal sonography to predict pulmonary abnormalities in the emergency department
AID  - 10.1136/emj.2004.016352
DP  - 2005 Oct 01
TA  - Emergency Medicine Journal
PG  - 747--748
VI  - 22
IP  - 10
4099  - http://emj.bmj.com/content/22/10/747.short
4100  - http://emj.bmj.com/content/22/10/747.full
SO  - Emerg Med J2005 Oct 01; 22
AB  - Ring down artefacts are sometimes found when emergency physicians perform abdominal ultrasound to differentiate between various abdominal problems. We describe a patient who presented with right upper quadrant abdominal pain and whose ultrasound examination showed ring down artefacts posterior to the right hemidiaphragm, which led to the eventual diagnosis of pneumonia. Ring down artefacts on ultrasound may be used to predict pulmonary abnormalities. Awareness of this sonographic finding may assist in accurate diagnosis and administration of appropriate treatment without delay.