Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph obtained . Dual - lead pacer is unchanged with proximal lead in the expected location of the right atrium and distal lead in the expected location of the right ventricle . The lungs appear clear . No free air below the right hemidiaphragm . Left CP angle partially excluded .
    OUTPUT:
    
No free air below the right hemidiaphragm .