Chest CT Scan Signs CHEST Ray Animesh, MD, DNB, DM, Surabhi Vyas, MD, DNB CHEST Volume 153, Issue 6, Pages 1516-1517 (June 2018) DOI: 10.1016/j.chest.2018.03.014 Copyright © 2018 American College of Chest Physicians Terms and Conditions
Figure 1 Fallen lung sign: the collapsed lung (arrow) is seen in the dependent parts of the right hemithorax in a patient who sustained a motor vehicle accident. Note massive right pneumothorax, pneumomediastinum, and subcutaneous emphysema suggestive of airway rupture. CHEST 2018 153, 1516-1517DOI: (10.1016/j.chest.2018.03.014) Copyright © 2018 American College of Chest Physicians Terms and Conditions
Figure 2 Knuckle sign: abrupt tapering of right main pulmonary artery secondary to an embolus (arrow). CHEST 2018 153, 1516-1517DOI: (10.1016/j.chest.2018.03.014) Copyright © 2018 American College of Chest Physicians Terms and Conditions
Figure 3 Bird nest sign: contrast-enhanced CT thorax scan showing irregular, intersecting areas of stranding and irregular lines present within area of ground glass opacity. CHEST 2018 153, 1516-1517DOI: (10.1016/j.chest.2018.03.014) Copyright © 2018 American College of Chest Physicians Terms and Conditions