Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided PICC tip terminates in the proximal right atrium . The right internal jugular central venous catheter has been removed . The heart size is normal . The mediastinal and hilar contours are unremarkable . Pulmonary vasculature is normal . Small bilateral pleural effusions have decreased in size compared to the previous exam . There is improved aeration of the lung bases with minimal residual atelectasis . No new areas of focal consolidation are demonstrated . There is no pneumothorax . Percutaneous transhepatic biliary catheter is partially imaged . There are mild degenerative changes in the thoracic spine .
    OUTPUT:
    
Interval improvement in aeration of the lung bases with residual atelectasis , and decreasing small bilateral pleural effusions .