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.
Category Medical Specialty
Ombrédanne–Armingeat syndrome
Ombrédanne–Armingeat syndrome: historical infant postoperative pallor–hyperthermia syndrome and relationship to malignant hyperthermia.
Tönnis classification
Tönnis classification for developmental hip dysplasia: radiographic grades, key landmarks, limitations, historical development and the IHDI system
John J. Gartland
John Joseph Gartland (1918-2016), American orthopaedic surgeon. Gartland classification and Gartland–Werley score for fracture outcomes.
Westermark sign
Westermark sign: regional pulmonary oligaemia on chest X-ray in pulmonary embolism, with historical origins, imaging features and modern clinical relevance.
Nils Westermark
Nils Westermark (1892–1980), Swedish radiologist and Olympic silver medallist, remembered for the Westermark sign in pulmonary embolism.
Palla sign
Palla sign (1983) right descending pulmonary artery enlargement and 'sausage-shaped' appearance as a potential sign of pulmonary embolism on chest XR
Antonio Palla
Antonio Palla (born 1949), Italian respiratory physician known for Palla sign and major contributions to pulmonary embolism and respiratory medicine.
Hampton hump
Hampton hump: pleural-based pulmonary infarction on chest X-ray, with historical origins, radiographic features, pathology and modern PE relevance.
Aubrey Hampton
Aubrey Otis Hampton (1900–1955), American radiologist known for Hampton hump and Hampton line, with major contributions to chest and clinical radiology.
Chang sign
Chang sign (1965) Dilated descending pulmonary artery associated with pulmonary infarction and pulmonary hypertension following pulmonary embolism
Capener triangle
Capener triangle is an early AP radiographic sign of SCFE, showing loss of the normal triangular overlap between the femoral neck and acetabulum.