Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided dual - chamber pacemaker device is noted with leads again terminating in the right atrium and right ventricle . Moderate enlargement of cardiac silhouette is unchanged . The mediastinal and hilar contours are stable , with mild aortic knob calcifications again noted . Lung volumes are low . There is crowding of the bronchovascular structures , without evidence of pulmonary edema . No focal consolidation , pleural effusion or pneumothorax is visualized . Minimal atelectasis is seen in the lung bases . There are no acute osseous abnormalities .
    OUTPUT:
    
No radiographic evidence for pneumonia .