Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the prior radiograph , there has been insertion of a left chest tube and re-expansion of the left lung , with no appreciable pneumothorax on the current study . There are endobronchial valve seen in the left hilar region . The right lung is clear with no pleural effusion or pneumothorax . Bilateral coarse interstitial markings at the bases correspond to chronic interstitial changes .
    OUTPUT:
    
1 . Insertion of a left chest tube and re-expansion of the left lung . 2 . No appreciable pneumothorax on the left . 3 . Clear right lung .