Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior radiograph , the cardiac , mediastinal , and hilar contours are stable . No pleural effusion or pneumothorax is identified . No focal consolidation . A vagal stimulator device projecting over the left hemi thorax is unchanged . No free subdiaphragmatic air is identified .
    OUTPUT:
    
No acute cardiopulmonary process or free subdiaphragmatic air .