Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well inflated . The right lung field is clear , while the left lung field demonstrates a linear peripheral opacity in the base that is unchanged compared with prior study , likely representing scarring . No other focal opacities are noted . There is mild cardiomegaly , unchanged compared with ___ . Otherwise , the cardiomediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax . Sternotomy wires are intact . Clips from prior CABG are noted . Calcified pleural plaques are unchanged and compatible with prior asbestos exposure . Old right sided rib fractures are redemonstrated .
    OUTPUT:
    
No radiographic evidence of acute cardiopulmonary process .