Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is left - sided tunneled dual - lumen venous catheter seen with distal tip in the right atrium , similar to prior . The lungs are clear . The cardiomediastinal silhouette is within normal limits . Median sternotomy wires and mediastinal clips are again seen .
    OUTPUT:
    
No acute cardiopulmonary process .