Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to the previous radiograph , the right pigtail catheter was removed from the pleural space . The distribution and extent of the pre-existing parenchymal and pleural opacities on the right are constant . The presence of a minimal basal pneumothorax on the right can not be excluded . Unchanged appearance of the left lung and the cardiac silhouette .
    OUTPUT:
    
As compared to the previous radiograph , the right pigtail catheter was removed from the pleural space . The distribution and extent of the pre-existing parenchymal and pleural opacities on the right are constant . The presence of a minimal basal pneumothorax on the right can not be excluded . Unchanged appearance of the left lung and the cardiac silhouette .