Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single portable AP supine view of the chest was obtained . Lungs are well expanded and clear . Heart is top normal in size and cardiomediastinal contour is stable . A dual - chamber pacemaker is again noted with unchanged position of the leads in the right ventricle and right atrium . Central venous catheter tip is in the lower SVC . There is no pleural effusion and no pneumothorax .
    OUTPUT:
    
No evidence of pneumonia .