Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . There is an external artifact overlying the left neck and right mediastinum , which limits assessment of a true pneumomediastinum . Otherwise , the lungs are clear . There is no effusion or pneumothorax . The cardiomediastinal silhouette is normal . Imaged bony structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
1 . External artifact overlying the left neck and right mediastinum , which limits assessment of true pneumomediastinum . Please repeat study if that is of concern . 2 . No focal consolidation .