Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . There is relative elevation of the left hemidiaphragm and blunting of the lateral costophrenic angle likely due to pleural thickening or scar . The lungs are otherwise clear . The cardiomediastinal silhouette is within normal limits . Chronic left lateral rib fractures are noted .
    OUTPUT:
    
No acute cardiopulmonary process .