Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear with no focal opacities . There is some minimal bibasilar atelectasis . The cardiomediastinal silhouette and hilar contours are normal . The pleural surfaces are clear without effusion or pneumothorax . The left chest wall pacing device and pacer leads are unchanged in appearance .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .