Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left lung base pigtail catheter remains in place . There is a stable small left pleural effusion . Right basilar linear is new from the prior exam . A left lung base airspace opacity likely representing subsegmental atelectasis is essentially unchanged . There is no pneumothorax . The heart and mediastinum can not be accurately assessed on this projection . Regional bones and soft tissues are unremarkable .
    OUTPUT:
    
Unchanged small left pleural effusion . New right lower lobe linear atelectasis . Stable left lung base subsegmental atelectasis .