Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval placement of a right - sided pigtail catheter which projects over the lateral aspect of the right mid hemithorax on the frontal view with near - complete resolution of the previously seen pneumothorax . There has been interval re-expansion of the right lung . Hazy opacification within the right lung base might reflect an area of residual atelectasis . The left lung remains unchanged with emphysema again noted . Previously noted shift of mediastinal structures to the left has resolved . There is no pulmonary vascular congestion .
    OUTPUT:
    
Interval placement of right - sided pigtail catheter with near complete resolution of the previously seen pneumothorax and re-expansion of the right lung . Hazy opacity within the right lung base may reflect an area of residual atelectasis . The previously seen leftward shift of mediastinal structures has resolved .