Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded but there is increased retrocardiac opacity which may indicate left lower lobe atelectasis . There is also increased haziness over the left hemithorax suggesting small to moderate moderate left pleural effusion . haziness over the right base is improved . The heart is enlarged . ET tube is above the carina . The distal portion of the NG tube is in the stomach .
    OUTPUT:
    
Persistent left effusion and possible left lower lobe atelectasis . Improved right lower lung aeration .