Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest were acquired . A radiopaque skin marker is noted along the anterior aspect of the left sixth rib . The lungs are clear . The heart size is normal . The mediastinal contours are normal . There are no pleural effusions . No pneumothorax is seen . Anterior wedging of a lower thoracic vertebral body is not significantly changed . There are no displaced rib fractures identified .
    OUTPUT:
    
1 . No displaced rib fractures identified . If there is persistent concern for rib fracture , further evaluation with a dedicated rib series would be recommended . 2 . No acute cardiac or pulmonary process .