Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable . There is unchanged mild pleural thickening at each lung apex . Streaky left mid lung opacity is also unchanged and consistent with minor scarring . Bilateral nipple shadows are visualized . The lung fields appear otherwise clear . There is no pleural effusion or pneumothorax . Bony structures are unremarkable . There has been no definite change .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .