C. H. Joseph Chang

C. H. Joseph Chang (1929 - 2017)

C. H. Joseph Chang (1929 – 2017) was a Korean-American radiologist

Remembered for his description of Chang sign in 1965; one of several described CXR signs of pulmonary embolus


  • Born 7 July 1929 in Seoul, Korea
  • M.D.
  • PhD
  • Professor of Radiology at Kansas University
  • Died 15 November 2017 in Mission Hills, Kansas

Medical Eponyms
Chang sign (1965)

Chang sign on chest x-ray describes a dilated left or right descending pulmonary artery with an abrupt change in calibre, with an amputated appearance. This sign is most commonly associated with with pulmonary infarction and pulmonary hypertension following pulmonary embolism

Major Publications



the names behind the name

Doctor in Australia. Keen interest in internal medicine, medical education, and medical history.

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.