Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mild to moderately enlarged , as seen previously . The mediastinal and hilar contours are relatively unchanged . Pulmonary vasculature is not engorged . Focal opacity is demonstrated within the right middle lobe concerning for pneumonia . No pleural effusion or pneumothorax is seen . The vagus nerve stimulator device is noted in the left ventral chest wall with lead coursing cephalad into the left neck . Clips are noted in the right upper abdomen .
    OUTPUT:
    
Focal opacity in the right middle lobe concerning for pneumonia . Follow up radiographs after treatment are recommended to ensure resolution of this finding .