Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to chest radiographs from ___ , large right pleural effusion is unchanged . No appreciable effusion on the left . Lung volumes remain low . Right internal jugular central venous catheter has been removed . Right basilar atelectasis has improved , as well as mild left basilar atelectasis . No new focal consolidation . Heart size is normal . No central vascular congestion or overt pulmonary edema . Right PIC line tip terminates close to the cavoatrial junction .
    OUTPUT:
    
Persistent large right pleural effusion . Improved bibasilar atelectasis .