Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear within normal limits . There is no pleural effusion or pneumothorax . There is mild elevation of the right hemidiaphragm . Streaky opacities in the right lower lung , probably referring mostly to the right middle lobe , suggest minor scarring . Otherwise , the lungs appear clear . Bony structures are unremarkable .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .