Chang sign (pulmonary embolism)

Dr Dan J Bell and Dr Henry Knipe et al.

The Chang sign refers to the dilatation and abrupt change in calibre of the main pulmonary artery due to pulmonary embolism 1

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 2.

See also

Chest x-ray
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Article information

rID: 29902
System: Chest
Section: Signs
Tags: stub, refs, cases
Synonyms or Alternate Spellings:
  • Chang sign
  • Changs sign
  • Chang sign in pulmonary embolism

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