Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Given for differences in technique , now PA and lateral compared to portable view from the moderate to large multiloculated left pleural collection has not substantially changed . At least 4 air - fluid levels are again demonstrated . The pleural catheter is in similar position . The right lung remains clear .
    OUTPUT:
    
Moderate to large multiloculated collection , given for differences in technique has not substantially changed