Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate no radiopaque foreign body in the upper chest . The lungs are clear . There is no pleural effusion or pneumothorax . The cardiac silhouette is normal in size , the mediastinal contours are normal . The pulmonary vasculature is normal .
    OUTPUT:
    
Normal chest . No evidence of radiopaque foreign body .