Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable semi upright view of the chest . Intervally placed right pigtail chest tube noted projecting over the right lung base . There is a persistent right apical pneumothorax which appears perhaps slightly improved from prior exam . No associated tension . Mild left basal atelectasis noted .
    OUTPUT:
    
Right basal pigtail chest tube in place . Persistent right apical pneumothorax , perhaps mildly improved from prior . Close followup advised .