Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right - sided pleural effusion is smaller . Platelike atelectasis at the right lung base again noted . Tiny left pleural effusion . Otherwise , no new pulmonary abnormalities since the last exam dated ___ . The mediastinum is still wide , but decreased in size compared to prior radiograph .
    OUTPUT:
    
Interval decrease in size of right pleural effusion and width of mediastinum .