Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is unchanged , appearing mildly enlarged . Mediastinal and hilar contours are stable with calcification of the thoracic aorta again noted . The pulmonary vasculature is normal . Streaky left lower lobe opacity is concerning for an area of infection . No pleural effusion or pneumothorax is present . Clips are noted in the right upper quadrant of the abdomen as well as a biliary stent . There is evidence of prior L1 kyphoplasty .
    OUTPUT:
    
Patchy left lower lobe opacity is concerning for pneumonia .