Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable chest radiograph is provided . A pigtail catheter is present within the right mid pleural space . There has been reexpansion of the lung with essential resolution of the large pneumothorax with a small residual pneumothorax remaining . Opacity in the right mid-lung may represent atlectasis . The left lung is clear except for left lower lobe atelectasis . Median sternotomy wires are noted . The cardiac silhouette is unremarkable . Right basilar opacity is likely atelectasis .
    OUTPUT:
    
Large pneumothorax has essentially resolved with small residual pneumothorax .