Albert Henry Freiberg
Albert Henry Freiberg (1868-1940), American orthopaedic surgeon who described Freiberg infraction and helped advance orthopaedics and disability rehabilitation.
Ernst Baumann
Ernst Baumann (1890-1978). Swiss surgeon and traumatologist associated with the Baumann angle, elbow fracture care and the founding of the AO.
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.
Fleischner sign
Fleischner sign: prominent central pulmonary artery enlargement in pulmonary embolism, with history, mechanism, imaging features and diagnostic relevance.
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
Felix Fleischner
Felix Fleischner (1893–1969), Austrian-American chest radiologist known for Fleischner sign, Fleischner lines and the Fleischner Society.
Fleischner lines
Fleischner lines: linear plate-like atelectatic opacities on chest radiograph, with historical origins, mechanism and association with pulmonary embolism.
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