Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since prior radiograph from ___ , endotracheal tube has been removed . Left lower lung opacity which is likely a combination of mild - to - moderate effusion and left lower lung atelectasis has overall unchanged . Right lung and left upper lung are clear . Small right pleural effusion is also similar . Heart size , mediastinal and hilar contours are unremarkable .
    OUTPUT:
    
Left lower lung opacity is likely from combination of atelectasis and left pleural effusion and presumed small right pleural effusions are unchanged over last 24 hours . No new opacities .