Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient remains intubated . The endotracheal tube terminates approximately 6 cm above the carina , as before . An orogastric tube courses into the stomach , its distal course not imaged , below the inferior margin of the film . A left - sided PICC line terminates at the cavoatrial junction . There is persistent confluent retrocardiac opacification with a small or perhaps small - to - moderate layering pleural effusion . Allowing for small differences in technique , findings are probably unchanged . There is no pneumothorax .
    OUTPUT:
    
Persistent left lower lobe opacification , in a pattern which is very commonly due to atelectasis although an infectious process is not excluded , with pleural effusion .