Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bilateral lungs are well expanded and probably remarkable for only minimal bibasal atelectasis . Patient is status post left sternoclavicular joint resection . There is no evidence of pneumothorax . There is no pleural effusion . Heart size , mediastinal and hilar contours are normal .
    OUTPUT:
    
No evidence of pneumothorax .