Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is top normal . Mediastinal and hilar contours are unremarkable with calcification of the aortic arch again noted . Lungs are clear . Pulmonary vascularity is normal . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities . Multilevel degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .