Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal and hilar contours are stable . Bilateral parenchymal scarring is again seen and stable in appearance from the prior study . Chain sutures are seen involving the right midlung as before . There is no focal consolidation , pleural effusion or pneumothorax .
    OUTPUT:
    
Chronic changes in the lungs without superimposed acute cardiopulmonary process .