Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Unchanged position of a Swan - Ganz catheter and left - sided pacemaker with a single intact pacer wire . Right PICC terminates at the cavoatrial junction . Low lung volumes with unchanged linear atelectasis in the left lower lobe . No pleural effusion or pneumothorax .
    OUTPUT:
    
No significant interval change .