Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no appreciable change from the study of ___ . Lungs are hyperexpanded but clear . There is no pleural effusion or pneumothorax . Heart size is normal . The mediastinal and hilar contours are normal . The aorta is unfolded .
    OUTPUT:
    
Unchanged mild hyperexpansion . No evidence of pneumonia .