Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right - sided chest tube and epidural catheter are unchanged in appearance when compared to the prior study . Lung volumes are also unchanged with a small right pleural effusion , similar when compared to the prior study . There is mild right basilar atelectasis . Superimposed infection can not be excluded . The left lung appears grossly clear .
    OUTPUT:
    
No significant interval change when compared to the prior study .