Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs remain clear except for minimal streaky density at the left base most consistent with subsegmental atelectasis or scarring . . The heart is normal in size . The aorta is mildly tortuous . A hiatal hernia is no longer apparent . Mediastinal structures are otherwise unremarkable . Old rib fractures are again demonstrated on the right . The bony thorax is grossly intact .
    OUTPUT:
    
No active pulmonary disease