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 aortic knob is noted . The lungs are clear and the pulmonary vasculature is normal . No focal consolidation , pleural effusion or pneumothorax is visualized . There are no acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary abnormality .