Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is at the upper limits of normal size . The mediastinal and hilar contours appear within normal limits . There are streaky basilar opacities most suggestive of minor atelectasis . Otherwise , the lungs appear clear . There are no pleural effusions or pneumothorax . Bony structures are unremarkable .
    OUTPUT:
    
Streaky posterior basilar opacities , more suggestive of atelectases than pneumonia , although early infection is difficult to entirely exclude .