Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated but clear . Biapical pleural thickening is unchanged . Horizontally oriented right perihilar scar or atelectasis is stable . There is no focal consolidation , pleural effusion , or pneumothorax . Heart size and mediastinal contours are normal .
    OUTPUT:
    
No evidence of pneumonia .