Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest provided demonstrate dual - lead AICD with lead tips extending in the expected location of the right atrium and right ventricle , unchanged . The heart remains borderline enlarged . The mediastinum likely reflects patient 's slightly rotated position . There are no signs of pneumonia or CHF . No pleural effusion is seen . No signs of pneumothorax . Bony structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
No acute intrathoracic process .