Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Redemonstrated is the right pleural effusion and right lower and mid lung zone diffuse opacity , likely representing atelectasis ; however , superimposed pneumonia can not be excluded . There is no evidence of a pneumothorax . The right upper lung chest tube is unchanged . The cardiomediastinal silhouette and hila are normal .
    OUTPUT:
    
1 . Unchanged right pleural effusion and right mid and lower lung zone opacity . 2 . No evidence of pneumothorax .