Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient status post sternotomy . The ET tube is in good position . Suture line over the left chest wall is identified where there is nonspecific increased opacity an day left basal effusion . The right - sided pigtail catheter remains in good position . No evidence of pneumothorax on either side . Degenerative changes in the visualized spine
    OUTPUT:
    
No evidence of pneumothorax .