Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The underinflated lungs are clear . The heart size is normal . There is slight prominence of the right mediastinal contour which is likely due to prominent azygos arch and superior vena cava . The hilar and mediastinal contours are otherwise normal . There is no pneumothorax or pleural effusion . Pulmonary vascularity is normal . Incidentally noted is anterior widening of the L1 - L2 disc space , new from the ___ CT - significance is uncertain - could be artefactual
    OUTPUT:
    
1 . No pneumothorax or other acute intrathoracic process . 2 . Incidentally noted apparent widening of the L1 - L2 anterior disc space .