Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are severely hyperinflated , consistent with emphysematous changes . These changes are more pronounced at the apices . There is minimal , if any , pulmonary edema , which is slightly improved from the prior exam . There is no focal airspace consolidation , pleural effusion , or pneumothorax . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
1 . Minimal , if any , pulmonary edema , which is slightly improved from the prior exam . 2 . Stable severe emphysema .