Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No radiopaque foreign body is identified within the trachea or esophagus on this chest radiograph . The lungs are clear . There is no focal consolidation or pneumothorax . There is no vascular congestion or pleural effusions . Cardiomediastinal and hilar contours are within normal limits and unchanged from prior .
    OUTPUT:
    
1 . No radiopaque foreign body . 2 . No acute cardiopulmonary process .