Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate well expanded clear lungs . There is no pneumothorax , pleural effusion or consolidation . The cardiomediastinal and hilar contours are unchanged . Old healed rib fracture along the lateral right 7th rib is again seen . There is atherosclerotic calcification of the aortic knob . No displaced rib fracture is identified .
    OUTPUT:
    
No acute cardiopulmonary process . No displaced rib fracture identified .