Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a subtle opacity overlying the right lower lobe . Otherwise , the left lung is clear . The cardiac silhouette is normal . There are no pneumothoraces or pleural effusions . No acute fractures are identified .
    OUTPUT:
    
Subtle increased opacity overlying the right lower lobe is likely representative of atelectasis . However , an early developing pneumonia may be present in the proper clinical setting .