Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA AND LATERAL VIEWS OF THE CHEST . The lateral view is limited by patient 's arm being down . Mediastinum is slightly widened ; however , this is likely due to fat deposition as was seen on prior CTA chest on ___ . Lungs are clear . There is no evidence of pneumonia . No pneumothorax . No pleural effusion . Cardiac enlargement is stable . Normal hilar contours .
    OUTPUT:
    
No evidence of pneumonia .