Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest . Compared to prior , there has been no significant interval change . Again seen are relatively low lung volumes . Linear bibasilar opacities likely due to atelectasis . Cardiomediastinal silhouette is within normal limits . There is no visualized displaced fracture on this nondedicated exam .
    OUTPUT:
    
No definite acute cardiopulmonary process .