Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal lateral radiographs of the chest demonstrate normal heart size and mediastinal contours . No focal consolidation , pleural effusion or pneumothorax . Multiple old healed right rib fractures , but no acute displaced rib fracture . Mild anterior wedging of a mid thoracic vertebral body .
    OUTPUT:
    
No acute displaced rib fracture .