Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . Aorta is tortuous with enlargement of the aortic knob and displaced intimal calcifications compatible with known aortic arch aneurysm , unchanged . The pulmonary vascularity is not engorged . The lungs are hyperinflated with emphysematous changes again noted . Increased streaky opacity in the right lung base may reflect atelectasis though infection can not be excluded . 15 mm lingular nodule is unchanged . No pleural effusion or pneumothorax . A mid thoracic vertebral body compression deformity is re - demonstrated .
    OUTPUT:
    
1 . Increased streaky opacity within the right lung base which could reflect atelectasis but infection can not be excluded . 2 . Emphysema . 3 . Unchanged 15 mm nodule within the lingula . As noted on the prior PET CT from ___ , continued imaging followup of this lesion is recommended , and a chest CT should be obtained at this time . 4 . Aortic arch aneurysm , unchanged .