Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no focal consolidation , pleural effusion , or pneumothorax . Lungs are hyperexpanded , and there are bullous changes at the apices and prominence of the interstitial markings consistent with emphysema . Linear opacities at the bases are likely atelectasis . There is prominence of the hilar contours which are stable since ___ . Cardiomediastinal silhouette is otherwise unremarkable and unchanged . Osseous structures are intact .
    OUTPUT:
    
No acute cardiopulmonary process . Severe emphysematous changes .