Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . Mediastinal and hilar contours are unremarkable . Pulmonary vascularity is normal and the lungs are clear . No pleural effusion or pneumothorax is seen . Clips in the neck indicate prior thyroidectomy . No acute osseous abnormalities are seen .
    OUTPUT:
    
No acute cardiopulmonary abnormality .