![Westermark's and Palla's signs in acute and chronic pulmonary embolism: Still valid in the current computed tomography era. - Abstract - Europe PMC Westermark's and Palla's signs in acute and chronic pulmonary embolism: Still valid in the current computed tomography era. - Abstract - Europe PMC](https://europepmc.org/articles/PMC3912657/bin/JETS-7-57-g001.jpg)
Westermark's and Palla's signs in acute and chronic pulmonary embolism: Still valid in the current computed tomography era. - Abstract - Europe PMC
![Chest X-ray showing a mass in the left upper lung field (Palla's sign). | Download Scientific Diagram Chest X-ray showing a mass in the left upper lung field (Palla's sign). | Download Scientific Diagram](https://www.researchgate.net/publication/236255497/figure/fig3/AS:1088972524666896@1636642690687/Chest-X-ray-showing-a-mass-in-the-left-upper-lung-field-Pallas-sign.jpg)
Chest X-ray showing a mass in the left upper lung field (Palla's sign). | Download Scientific Diagram
![Hampton's hump, Westermark's sign and Palla's sign in acute pulmonary thromboembolism: a rare concurrence | BMJ Case Reports Hampton's hump, Westermark's sign and Palla's sign in acute pulmonary thromboembolism: a rare concurrence | BMJ Case Reports](https://casereports.bmj.com/content/bmjcr/12/9/e231693/F2.large.jpg)
Hampton's hump, Westermark's sign and Palla's sign in acute pulmonary thromboembolism: a rare concurrence | BMJ Case Reports
![Subtle chest x-ray signs of pulmonary thromboembolism: the Palla's and Westermark's signs | Postgraduate Medical Journal Subtle chest x-ray signs of pulmonary thromboembolism: the Palla's and Westermark's signs | Postgraduate Medical Journal](https://pmj.bmj.com/content/postgradmedj/89/1050/241/F4.large.jpg)