Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a thin linear opacity overlying the patient 's neck on the frontal view , presumably external . The lungs are clear . The hilar and cardiomediastinal contours are normal . There is no pneumothorax . There is no pleural effusion . Pulmonary vascularity is normal .
    OUTPUT:
    
No acute cardiopulmonary process . Thin linear object overlying the patient 's neck on the frontal view is presumably external . Correlate clinically .