Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrate low lung volumes with associated atelectasis at the lung bases . Opacities of the left lung in the lingula appear to have been present previously may in part be due to summation of shadows . Cardiomediastinal and hilar contours are stable relative to prior examination dated ___ . There is no pleural effusion or pneumothorax . No opacity convincing for pneumonia is present .
    OUTPUT:
    
Low lung volumes without convincing evidence for pneumonia .