Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Relatively low lung volumes are noted particularly on the frontal view . Lungs are grossly clear . The cardiomediastinal silhouette is within normal limits . Small hiatal hernia is noted . Median sternotomy wires are noted . No acute osseous abnormalities . Vascular stent noted within the upper abdomen .
    OUTPUT:
    
No acute cardiopulmonary process .