Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . The heart is normal in size . The mediastinal and hilar contours are within normal limits . There is a moderate right pleural effusion , not significantly changed from the prior study allowing for differences in technique . There is minimal adjacent right basilar atelectasis . The left lung is clear . No evidence of left pleural effusion . No pneumothorax identified .
    OUTPUT:
    
Persistent right pleural effusion and minimal right basal atelectasis .