Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are normal . The lungs are clear and the pulmonary vascularity is normal . No pleural effusion or pneumothorax is visualized . Old left - sided rib fractures are again noted . Oral contrast material is seen within the colon .
    OUTPUT:
    
No acute cardiopulmonary abnormality .