Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest was obtained . Free air is present underneath both hemidiaphragms . Lung volumes are low . The vascular pedicle is widened and there is slightly increased rightward shift of the trachea , which may be projectional . Multi focal ill - defined lung opacities are similar to prior and consistent with history of sarcoidosis although superimposed infection can not be excluded . No pneumothorax or substantial pleural effusion . Chain sutures in the right mid lung are similar to prior .
    OUTPUT:
    
1 . Pneumoperitoneum . 2 . Widening of the vascular pedicle may be related to low lung volumes and intravascular volume status .