Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior radiograph , there has been interval improvement , but not complete resolution of the right pleural effusion . Right pigtail catheter is in place . Small left pleural effusion is constant . Heart size , mediastinal , and hilar contours are normal . The upper lung fields remain clear . Unchanged left Port - A - Cath terminates in the right atrium .
    OUTPUT:
    
Improved , but not completely resolved right pleural effusion . Stable small left pleural effusion . Right pigtail catheter remains in place .