Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single supine portable view of the chest . Low lung volumes are again noted . The lungs are grossly clear . Cardiomediastinal silhouette is stable . Densely calcified thoracic aorta is noted . Left chest wall dual - lead pacing device is seen . No displaced fractures identified .
    OUTPUT:
    
No acute cardiopulmonary process .