Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The monitoring and support devices are stable and in good position . No pneumothorax is visualized since clamping the chest tube . Chronic linear scarring and right pleural fluid has not significantly changed . The appearance of the left lung has also not significantly changed . The heart size is stable .
    OUTPUT:
    
No pneumothorax post chest tube clamping .