Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior study , no change in the positioning of the endotracheal tube and right IJ central line . The NG tube terminates in the stomach . Left retrocardiac atelectasis has improved . There is a small persistent left basilar opacity . The right lung is better aerated . No evidence of pneumothorax .
    OUTPUT:
    
Significant improvement in the retrocardiac consolidation suggests a mucous plug was likely cleared . Persistent left basilar opacity may be due to a small residual effusion and atelectasis .