Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright portable chest radiograph is obtained . There has been interval placement of a right chest tube with the tip of the chest tube near the right lung apex . There is a small residual pneumothorax , though there has been significant reexpansion of the right lung . There is mild left basal atelectasis .
    OUTPUT:
    
Minimal residual pneumothorax on the right status post chest tube insertion .