Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low and exaggerate the pulmonary vascular markings . Cardiomediastinal silhouette is exaggerated , but likely at the upper limits of normal . The lungs are without focal consolidation or pneumothorax . Old left rib fractures are noted with no acute fractures identified .
    OUTPUT:
    
Low lung volumes with no acute cardiopulmonary process .