Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are unremarkable with calcification of the thoracic aorta noted . The pulmonary vascularity is normal . No focal consolidation is identified . No large pleural effusion or pneumothorax is seen . Scarring within the lung apices is stable . Known nodular opacities with in the left lower lobe are better appreciated on the prior CT . The lungs are hyperinflated with flattening of the diaphragms compatible with underlying COPD . There are multilevel degenerative changes in the thoracic spine . Old bilateral rib fractures are present . Partially imaged is a biliary stent within the right upper quadrant .
    OUTPUT:
    
No definite radiographic evidence for pneumonia . COPD .