Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The mediastinal and hilar contours are unchanged . There is a largely unchanged right apical pneumothorax , with a pleural line overlying the posterior fourth rib . No focal consolidation , pleural effusion , or left pneumothorax identified .
    OUTPUT:
    
No significant change in the right apical pneumothorax .