Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left basilar pneumothorax has significantly decreased since prior exam . Interval placement of left pleural catheter . Improved left basilar atelectasis . Improved right basilar atelectasis . Mild right pleural effusion . Normal heart size , pulmonary vascularity . Cardiac pacemaker . Port - A - Cath in place . Surgical clips upper abdomen .
    OUTPUT:
    
Interval significant improvement of left pneumothorax .