Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and left - sided pacemaker placement with leads terminating in the region of right ventricle and along the lateral contour of the left ventricle . Several clips are scattered about the mediastinal and left hilar region . Mild - to - moderate enlargement of the heart is unchanged . The mediastinal and hilar contours are stable . There is a new opacification within the right middle lobe concerning for pneumonia . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Right middle lobe opacification compatible with pneumonia . Follow up radiographs after treatment are recommended to ensure resolution of this finding .