Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate stable cardiomediastinal contours . There is stable mild pulmonary vascular prominence . No clear sign of pneumonia . No pleural effusion or pneumothorax . No displaced rib fracture .
    OUTPUT:
    
No acute cardiopulmonary process . No displaced rib fractures .