Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is a large right pleural effusion with a basilar atelectasis , not significantly changed from ___ . Mild left basilar atelectasis with blunting of the costophrenic sulcus is also unchanged . There is no pulmonary vascular congestion . The cardiomediastinal silhouette is stable . There is no pneumothorax .
    OUTPUT:
    
Large right pleural effusion and bibasilar atelectasis . Superimposed infection can not be excluded .