Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is top normal , unchanged . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is normal . Lungs are clear . No pleural effusion or pneumothorax is demonstrated . No acute osseous abnormality is seen . There is no subdiaphragmatic free air .
    OUTPUT:
    
No acute cardiopulmonary abnormality . No subdiaphragmatic free air .