Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac size is top - normal . The aorta is tortuous . Faint ill - defined opacity in the right lung projecting over the anterior right fifth rib is of unknown etiology could be atelectasis but focal infection can not be excluded . Left lower lobe atelectasis have increased . Spinal hardware is again noted . Right peripheral catheter has been removed
    OUTPUT:
    
Faint opacity in the right lung could be atelectasis , small focus of infection can not be totally excluded