Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate - sized loculated collection in the right lower lung is new since ___ . Moderate amount of right lower lung atelectasis is present . Left lung and right upper lung are clear . Heart size , mediastinal and hilar contours are stable . Right pigtail catheter seen on the prior radiograph has been removed .
    OUTPUT:
    
Mild - to - moderate loculated fluid in the right lower lung is new following the removal of the right pigtail drain tube . Right lower lung atelectasis is mild to moderate and persisting .