Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear . The hila and pulmonary vascular are normal . No pleural effusions or pneumothorax . The heart size slightly enlarged . The mediastinum is normal . The transvenous pacer is positioned with tips terminating in right atrium and right ventricle .
    OUTPUT:
    
No acute cardiopulmonary process .