Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided chest tube is overall in similar position compared to the prior exam ; however , there has been interval improvement of a moderate right - sided pleural effusion with opacification of the right lung base likely secondary to re-expansion edema . There has been interval increase in the atelectasis at the left lung base . There may be a tiny right apical pneumothorax . The remainder of the left lung is clear . The cardiomediastinal contours are unchanged . Again seen is a ventriculoperitoneal shunt coursing across the chest to the right of midline .
    OUTPUT:
    
1 . Interval improvement of a moderate right pleural effusion with adjacent opacity , likely secondary to re-expansion edema . 2 . Possible tiny right apical pneumothorax .