CXR eponyms in pulmonary embolism
CXR eponyms in pulmonary embolism: Westermark, Hampton, Fleischner, Chang and Palla signs, their history, original descriptions and modern relevance.
Tag Chang sign
C. H. Joseph Chang
C. H. Joseph Chang (1929–2017), Korean-American radiologist known for Chang sign and pioneering work in mammography and dedicated breast CT imaging.
Palla sign
Palla sign (1983) right descending pulmonary artery enlargement and 'sausage-shaped' appearance as a potential sign of pulmonary embolism on chest XR
Chang sign
Chang sign (1965) Dilated descending pulmonary artery associated with pulmonary infarction and pulmonary hypertension following pulmonary embolism