Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild bibasilar opacities may be due to atelectasis or aspiration , infection not entirely excluded . No pleural effusion or pneumothorax is seen . The lungs are hyperinflated with flattening of the diaphragms consistent with COPD . Relative lucency involving the upper lobes consistent with patient 's known pulmonary emphysema . The cardiac and mediastinal silhouettes are stable and unremarkable . There is stable mild anterior wedging of a lower thoracic vertebral body .
    OUTPUT:
    
Small bibasilar opacities may be due to atelectasis or aspiration , infectious process not entirely excluded . COPD / pulmonary emphysema .