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 streaky opacity in the right mid lung , suggesting minor atelectasis or scarring . Otherwise , the lungs appear clear . There are no pleural effusions or pneumothorax . Bony structures are unremarkable .
    OUTPUT:
    
No evidence of acute disease .