Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild left pleural effusion , mildly improved . Improved left perihilar opacity , likely improving atelectasis . Stable left basilar consolidation , likely atelectasis . Right lung clear . Cardiac pacemaker . No pneumothorax . Surgical clips right upper quadrant .
    OUTPUT:
    
Left pleural effusion , mildly improved . Improved left perihilar atelectasis .