Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to ___ , there has been interval removal of the chest tube . There is decreased in left upper lobe and left basal opacity . Residual left pleural effusion is small . The lateral pleural abnormality is not seen on today 's exam . The right lung is grossly clear . The heart size is mildly enlarged and unchanged from prior . The mediastinal contours are unchanged from prior . Surgical clips are seen in the left upper lobe . Left subdiaphragmatic drain is seen . No pneumothorax is seen .
    OUTPUT:
    
Improved appearance of left pleural effusion with minimal residual effusion .