Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is top normal . Cardiomediastinal silhouette and hilar contours are stable with a tortuous aorta . There is minimal bibasilar linear scarring unchanged from ___ . Lungs are otherwise clear . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Minimal bibasilar linear scarring without evidence of pneumonia .