Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well - expanded and clear . There is no pleural effusion or pneumothorax . Heart size is normal . The mediastinal and hilar contours are normal . No displaced rib fractures detected .
    OUTPUT:
    
No acute cardiopulmonary abnormality . No evidence of displaced rib fracture within the limitations of routine chest radiographs .