Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Lung volumes are low . Overlying EKG leads are present . Allowing for low lung volumes , the lungs are clear without focal consolidation , large effusion or pneumothorax . The heart is likely within normal limits allowing for technique . Mediastinal contours unremarkable . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Limited , negative .