List six radiologic signs of PE on CXR.

Notably, the CXR may be nearly normal
1. Westermark's sign (oligemia in area of involvement)
2. Increased size of a hilum (caused by thrombus impaction)
3. Atelectasis with elevation of hemidiaphragm and linear or disk-shaped densities
4. Pleural effusion (usually unilateral, often bloody)
5. Consolidation (multifocal, lower lobe predominance), seen with infarction
6. Hampton's hump