Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are within normal limits . Lungs are clear and the pulmonary vascularity is normal . There are no pleural effusions or pneumothoraces . No displaced rib fractures or other acute osseous abnormality is identified .
    OUTPUT:
    
No acute cardiopulmonary abnormality .