Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are unchanged , with the heart size within normal limits . Lungs are clear and the pulmonary vasculature is normal . No pleural effusion or pneumothorax is present . No acute osseous abnormality is visualized . No subdiaphragmatic free air is seen .
    OUTPUT:
    
No acute cardiopulmonary abnormality .