Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The radiograph was obtained in a slightly lordotic position . There is mild left lower lobe atelectasis but no focal parenchymal opacities concerning for pneumonia . Cardiomediastinal and hilar contours are unremarkable . No pleural effusion or pneumothorax is present . There is no evidence of subdiaphragmatic free air .
    OUTPUT:
    
Left lower lobe atelectasis . Otherwise normal chest radiographic examination . No subdiaphragmatic free air .