Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the prior radiograph performed yesterday afternoon , there has been interval placement of a left - sided pigtail catheter . This has resulted in overall improvement in the left pleural effusion , though a small effusion persists . A moderately sized layering pleural effusion is also noted on the right . No pneumothorax . Other support lines interfaces are stable in position . The Swan - Ganz catheter terminates in the right pulmonary artery . Enteric tube is seen in the stomach . Left internal jugular introducer terminates in the low SVC . Median sternotomy wires are intact .
    OUTPUT:
    
Slight interval improvement in left pleural effusion status post pigtail catheter placement . No pneumothorax .