Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are hyperinflated . Bilateral and symmetric apical thickening is unchanged . Bilateral linear opacities in the upper lungs are unchanged since at least ___ and may represent emphysema or sequelae of past radiation . Right perihilar scar or atelectasis is unchanged . There is no focal consolidation , effusion , or pneumothorax . Heart size normal . Mediastinal and hilar contours are normal .
    OUTPUT:
    
No evidence of pneumonia .