Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy . A left - sided dual - chamber pacemaker device with leads terminating in the right atrium and right ventricle is unchanged . The cardiac , mediastinal and hilar contours are stable , with tortuosity of the thoracic aorta again noted . Mild calcification of the thoracic aorta is also redemonstrated . The heart size is not enlarged . The pulmonary vascularity is normal and the lungs are clear . Mild elevation of the left hemidiaphragm is chronic . No pleural effusion or pneumothorax is identified . No acute osseous abnormalities seen .
    OUTPUT:
    
No acute cardiopulmonary process .