Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval placement of a right pleural pigtail catheter with essentially complete resolution of the previously described pneumothorax . The lung volumes are low , but opacity at the right cardiophrenic angle may represent hemorrhage from recent biopsy of the right lower lobe . Scarring / atelectasis is present along the medial aspect of the left lung , possibly representing prior radiation . The heart and mediastinal contours are within normal limits .
    OUTPUT:
    
Status post right pleural catheter , with essentially complete resolution of pneumothorax .