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 is a patchy right basilar opacification , non-specific but probably attributed to atelectasis . There is no pleural effusion or pneumothorax . Bony structures are unremarkable .
    OUTPUT:
    
Patchy right basilar opacity , probably attributed to atelectasis , although not entirely specific .