Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest demonstrate a 4 mm circular metallic density in the soft tissues of the right medial chest wall anteriorly with an appearance consistent with a metal BB . Deep to this , in the right lower lobe posteriorly are chain sutures . The lungs are clear and well expanded , and heart and mediastinal contours are within normal limits in size and shape . Mild upper thoracic levoscoliosis is present .
    OUTPUT:
    
Metallic BB in the anterior soft tissues of the right chest wall medially in the patient who has had previous thoracic pulmonary surgery on the right .