Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are relatively low lung volumes . Linear bibasilar opacities are seen which may relate to atelectasis although developing infectious process is not excluded in the appropriate clinical setting . No large pleural effusion or pneumothorax is seen . The cardiac silhouette is top - normal . Mediastinal contours are unremarkable .
    OUTPUT:
    
Low lung volumes with linear bibasilar opacities likely representing atelectasis , underlying infectious process not excluded in the appropriate clinical setting .