Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged with left ventricular configuration . The aortic arch is calcified . The mediastinal and hilar contours appear unchanged . Blunting of the left costophrenic angle suggests perhaps a very small pleural effusion or atelectasis . Chain suture material is new since the earlier examination along the right upper lung . Otherwise , the lungs appear clear .
    OUTPUT:
    
Blunting of the left costophrenic sulcus that may suggest a small effusion and post-surgical change in the right upper lung ; otherwise unremarkable .