Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable semi upright view of the chest . There has been interval placement of a left chest tube with the tip of the left chest tube positioned medially in the left upper chest . There is no large residual pneumothorax . Scattered atelectasis in the left lung noted . Subcutaneous emphysema along the chest tube insertion site in the left chest wall noted .
    OUTPUT:
    
Interval placement of left chest tube . No large residual pneumothorax .