Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the radiograph obtained approximately 8 hours prior , lung volumes are lower . Opacification of the left hemithorax has increased , possibly positional given exaggerated lordotic view . Multiple bulla are now better appreciated , the largest of which located at the left lung apex . The right hemithorax opacities are essentially unchanged , likely a combination of atelectasis and pleural fluid . Prior right rib fractures are again seen .
    OUTPUT:
    
Increased left hemithorax opacification may be related to exaggerated lordotic view . Concurrent pneumonia is possible .