Chang sign (pulmonary embolism)
Citation, DOI, disclosures and article data
At the time the article was created Henry Knipe had no recorded disclosures.View Henry Knipe's current disclosures
At the time the article was last revised Calum Worsley had no recorded disclosures.View Calum Worsley's current disclosures
The Chang sign refers to the dilatation and abrupt change in caliber of the main pulmonary artery due to pulmonary embolism 1. It is one of several described signs of pulmonary embolus on chest radiographs.
History and etymology
It is named after C H Joseph Chang, (7 July 1929 - 15 November 2017) an American radiologist, who first described it in 1965 2.