Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again demonstrated is a left pectoral vagal nerve stimulator , in unchanged position from the prior examination ___ . The cardiomediastinal and hilar contours are within normal limits . Lung volumes are slightly low . The pulmonary vasculature is normal . There is no focal consolidation , pleural effusion or pneumothorax . Note is made of multiple calcified left hilar lymph nodes , similar in appearance to the prior examination in ___ .
    OUTPUT:
    
No acute cardiopulmonary process .