Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart is upper limits of normal in size . Mediastinal hilar contours are normal . Lungs are clear except for linear bibasilar atelectasis and or scarring . Skeletal structures have been more fully assessed by recent skeletal survey of 1 day earlier .
    OUTPUT:
    
Linear bibasilar atelectasis or scar . No evidence