Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate clear lungs without effusion or pneumothorax . Cardiac and mediastinal contours are normal . Pulmonary vasculature is normal . No displaced rib fractures are seen . A left axillary stimulator unit is unchanged in position , with an unchanged appearance to an electrode in the left neck .
    OUTPUT:
    
1 . No pneumonia or acute chest abnormality . 2 . No displaced rib fractures are seen . If there is further concern for rib fracture , recommend repeat dedicated views with a BB marker that marks the site of pain .