Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear . The cardiomediastinal silhouette and hilar contours are normal . No pleural effusion or pneumothorax is present . Calcifications are noted in the aortic arch . A radiopaque foreign object is noted overlying the left neck . Chronic fracture deformity of both clavicles is unchanged . A moderate hiatal hernia is partially imaged .
    OUTPUT:
    
No acute intrathoracic process . Radiopaque foreign object noted overlying the left neck , likely external .