Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Cardiomediastinal silhouette and hilar contours are normal . Lungs remain hyperinflated . Biapical scarring is unchanged . Lungs are otherwise clear . Pleural surfaces are clear without effusion or pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Stable hyperexpansion of the lungs of though no emphysema was noted on the prior CT .