Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is normal . Mediastinal hilar contours are normal . Pulmonary vasculature is normal . Patchy atelectasis seen in the lung bases . No focal consolidation , pleural effusion or pneumothorax is present . Remote left - sided rib fractures are seen .
    OUTPUT:
    
No acute cardiopulmonary abnormality .