Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is stable scarring in the right upper lobe , and bilateral severe emphysematous changes . There is no focal consolidation , pleural effusion , pneumothorax , or pulmonary edema . The cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
1 . Stable changes of severe emphysema . 2 . No evidence of acute cardiopulmonary process .