Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well inflated and clear . No pleural effusions . No pneumothorax . Right - sided central line terminates in the distal SVC upper at the cavoatrial junction . EKG leads overlie the chest wall . A small lucency projecting over the midline in the lower mediastinum likely represents a hiatus hernia and was also present , an unchanged since the prior radiograph dated ___ . Visualized bones are unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process .