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 the right pulmonary artery , the edge of the mediastinum is difficult to evaluate due to the moderately large pleural effusion , however based on the relationship to the more proximal portion of the Swan - Ganz catheter , this is likely in appropriate position . There is a moderately large right pleural effusion , unchanged compared to the prior study . There is associated compressive atelectasis . Small left pleural effusion versus pleural scarring . The lungs are otherwise clear except note mild hyperinflation . Mitral valve calcification and a mitral valve clip are seen .
    OUTPUT:
    
Swan - Ganz catheter , the tip positioned in the right pulmonary artery . It is difficult to assess how out into the pulmonary artery this is positioned as the mediastinal contours are obscured by a moderately large pleural effusion .