Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs were acquired . A radiopaque skin marker is seen along the left anterior second intercostal space . The lungs are clear . The heart size is normal . The mediastinal contours are normal . There are no pleural effusions . No pneumothorax is seen . No displaced rib fractures are identified .
    OUTPUT:
    
1 . No displaced rib fractures identified . If clinical concern for rib fracture persists , a dedicated rib series could be obtained . 2 . No acute cardiac or pulmonary process .