Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate a normal cardiomediastinal silhouette . Again seen is hyperlucency of the upper lobes bilaterally , compatible with known emphysema . There is no focal consolidation , pleural effusion , or pneumothorax . There is minimal bibasilar atelectasis . No evidence of free air is identified . The visualized upper abdomen is unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process or evidence of free air .