Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal and hilar contours are unchanged , with mild calcification of the thoracic aorta . The lungs are clear and the pulmonary vascularity is normal . There is no pleural effusion or pneumothorax . No acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary process .