Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . Lungs are clear bilaterally without focal consolidation , effusion , or pneumothorax . Cardiomediastinal silhouette is normal . Bony structures are intact . No free air below the right hemidiaphragm is seen . On the frontal radiograph , there is a radiopaque density projecting over the mid neck region which is likely external to the patient .
    OUTPUT:
    
No signs of pneumonia or CHF .