Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Two views of the chest demonstrate clear lungs , without pleural effusion or pneumothorax . There is mild apical pleural thickening seen bilaterally . There is unfolding of the thoracic aorta . The mediastinal contours are otherwise unremarkable with note made of calcification at the aortic arch . The cardiac silhouette is normal in size . There is mild pulmonary interstitial abnormality . There is mild loss of height of an upper thoracic vertebral body , likely chronic . Deformity likely reflecting a healed fracture is noted of the left posterior sixth rib .
    OUTPUT:
    
1 . No focal consolidation to suggest pneumonia . Mild interstitial pulmonary abnormality may reflect chronic changes . Recommend comparison with priors . 2 . There is mild loss of height of an upper thoracic vertebral body , likely chronic .