Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . In this patient with left chest tube placement for decompression of a pneumothorax , there is persistent atelectasis in the left lower lung without conspicuous residual pneumothorax . Subcutaneous emphysema is noted in the left lateral chest wall . Otherwise , no significant changes .
    OUTPUT:
    
Left chest tube in place , no residual pneumothorax seen . Persistent atelectasis in the left lower lung .