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 are post-surgical changes at the right lung apex , but no pneumothorax . There is no pleural effusion . The lungs appear clear . Bony structures are unremarkable .
    OUTPUT:
    
Post - surgical changes at the right lung apex , but no evidence of pneumothorax or other acute cardiopulmonary disease .