Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs : Well inflated and clear . Pleura : There is no pleural effusion or pneumothorax Mediastinum : Cardiomegaly noted . Bony thorax : Sternal sutures project over the midline . Left chest wall pacer and single lead are identified . ( Type not definitely known though likely ___ given the appearance )
    OUTPUT:
    
Left chest wall pacer and single lead are identified . ( Type not definitely known though likely ___ given the appearance ) Clear lungs , no pleural effusion or pneumothorax .