Palla sign
Palla sign (1983) right descending pulmonary artery enlargement and 'sausage-shaped' appearance as a potential sign of pulmonary embolism on chest XR
Tag pulmonary artery
Chang sign
Chang sign (1965) Dilated descending pulmonary artery associated with pulmonary infarction and pulmonary hypertension following pulmonary embolism
Antonio Palla
Antonio Palla (1949 - ) is an Italian respiratory and nuclear medicine specialist. Palla sign in pulmonary embolus (1983)