Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Biapical pleural scarring / thickening is seen and upward retraction of the hila , consistent with chronic changes . The lungs are hyperinflated . No pneumothorax is seen . No definite focal consolidation to suggest pneumonia is identified . There is no pleural effusion or pneumothorax . The cardiac silhouette is top - normal to mildly enlarged . Mediastinal contours are unremarkable .
    OUTPUT:
    
Chronic changes , as above . No definite focal consolidation to suggest pneumonia . No pneumothorax .