Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild enlargement of the cardiac silhouette . Marked tortuosity of thoracic aorta is unchanged . The mediastinal and hilar contours are stable . The pulmonary vasculature is normal . Minimal patchy opacity in the left lower lobe may reflect atelectasis . No focal consolidation , pleural effusion or pneumothorax is identified . No acute osseous abnormalities are seen . Dextroscoliosis of the thoracic spine is redemonstrated .
    OUTPUT:
    
Minimal patchy left lower lobe opacity may reflect atelectasis . Infection in the correct clinical setting can not be completely excluded .