Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval placement of a Swan - Ganz catheter . The tip is in a lobe were branch of the right pulmonary artery , either the right middle or right lower lobe . This could be withdrawn for better positioning within the right main pulmonary artery . The lung volumes are essentially unchanged . Minimal left basilar atelectasis . No consolidation or pneumothorax seen . No pleural effusion seen .
    OUTPUT:
    
The Swan - Ganz catheter terminates in a low per pulmonary artery on the right . This could be withdrawn for better seating within the main pulmonary artery .