Chang sign (pulmonary embolism)

The Chang sign refers to the dilatation and abrupt change in caliber of the main pulmonary artery due to pulmonary embolism . It is one of several described signs of pulmonary embolus on chest radiographs.

History and etymology

It is named after C H Joseph Chang, (July 7 1929 - November 15 2017) an American radiologist, who first described it in 1965 .

See also

Siehe auch: