Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval placement of a right pigtail pleural catheter . Associated re-expansion and improved aeration of the right upper lobe is noted . There is still a small pneumothorax along the right costophrenic angle with similar right costophrenic angle pleural thickening . The left lung is clear , and the heart is stable in size .
    OUTPUT:
    
Interval placement of a right pleural pigtail catheter with a small residual pneumothorax along the right costophrenic angle .