Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The mediastinal and hilar contours are normal . The pulmonary vasculature is normal . Lungs are clear . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities . As before , there is persistent elevation of the left hemidiaphragm . As before , there has been partial resection of the left posterior sixth rib . There are left mediastinal surgical clips .
    OUTPUT:
    
No acute cardiopulmonary abnormality .