Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes with bibasilar atelectasis . The right hemidiaphragm is elevated with gaseous distension of bowel beneath . No large pleural effusion is seen . Subtle posterior basilar opacity seen on the lateral view may represent atelectasis but consolidation is not excluded the appropriate clinical setting . Cardiac silhouette is enlarged . Superior mediastinum appears somewhat prominent , which may relate to low lung volumes . If clinical concern for acute mediastinal process , consider chest CTA .
    OUTPUT:
    
Low lung volumes . Elevated right hemidiaphragm with gaseous distention of bowel beneath . Subtle posterior basilar opacities seen on the lateral view may be due to atelectasis but consolidation is not excluded in the appropriate clinical setting . Prominent superior mediastinum may relate to low lung volumes however there is small concern for acute mediastinal process , consider chest CTA .