Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Small apical residual pneumothorax appreciated on ___ has completely resolved . Minimal irregularity in the right lung apex is probably scarring . Otherwise , lungs are clear . No effusions . The heart size is normal . The mediastinal and hilar contours are unremarkable .
    OUTPUT:
    
Since ___ , small residual right apical pneumothorax has resolved .