Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . Cardiomediastinal silhouette and hilar contours are unremarkable . No pneumothorax . Both lungs demonstrate signs of hyperinflation of the diaphragms consistent with emphysema . Vagal stimulator is in unchanged position . ACDF is noted in the lower cervical vertebra .
    OUTPUT:
    
No acute cardiopulmonary process .