Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . Subtle linear densities within the left lower lung may represent atelectasis , though an early pneumonia would be difficult to exclude in the correct clinical setting . The right lung is clear . No large effusion or pneumothorax . The bony structures appear intact . The cardiomediastinal silhouette appears normal .
    OUTPUT:
    
Densities in the left lower lung most compatible with atelectasis , though an early pneumonia can not be excluded in the correct clinical setting .