Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior chest radiograph , the PA view is more under penetrated . However , there is no evidence of focal consolidation , pleural effusion , or pneumothorax . There may be slight bibasilar atelectasis . Cardiomediastinal and hilar silhouettes are unchanged and are unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process .