Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is platelike atelectasis in the right mid lung , unchanged compared to the prior study . Ill - defined retrocardiac opacity again noted , left lower lobe atelectasis and a small effusion was seen in this area on the prior CT chest . The heart is enlarged , unchanged in degree when compared to the prior study . No consolidation or pneumothorax seen . No free air in the diaphragm .
    OUTPUT:
    
No significant interval change when compared to the prior study