Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Overlying trauma board limits evaluation . Cardiac , mediastinal and hilar contours are within normal limits . Lungs are clear . Pulmonary vascularity is not engorged . No pleural effusion or pneumothorax is visualized . No displaced rib fractures are identified .
    OUTPUT:
    
No acute cardiopulmonary abnormality .