Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided dual lumen central venous catheter tip terminates in the proximal right atrium , unchanged . The cardiac , mediastinal and hilar contours are unchanged and within normal limits . The pulmonary vasculature is normal . Lungs are clear . No pleural effusion or pneumothorax is present . No acute osseous abnormalities are visualized . No subdiaphragmatic free air is seen .
    OUTPUT:
    
No acute cardiopulmonary abnormality . No subdiaphragmatic free air is visualized .