Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left first posterior rib fracture is not seen on this study ; however , there is no bony displacement . The left hemidiaphragm is elevated . There is bibasilar atelectasis . The aorta is tortuous . The lungs are well expanded and clear , and their appearance correlates with patient 's known emphysema . Heart size is normal . Mediastinal and hilar contours are normal .
    OUTPUT:
    
No displaced fractures .