Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . Mediastinal contours are unremarkable . There is mild pulmonary vascular congestion with perihilar haziness . Patchy opacities in the lung bases likely reflect atelectasis . Infection is not completely excluded . There is no pleural effusion or pneumothorax is identified . No acute osseous abnormality seen .
    OUTPUT:
    
Mild pulmonary vascular congestion . Patchy bibasilar airspace opacities likely reflect atelectasis though infection is difficult to exclude in the correct clinical setting .