Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left anterior chest wall dual lead pacer is unchanged . Heart size is normal . There is mild unfolding of the thoracic aorta with knob calcifications . Hilar contours are unremarkable . Lungs are clear . Pleural surfaces are clear without effusion or pneumothorax . IVC filter is partially visualized .
    OUTPUT:
    
No acute cardiopulmonary abnormality .