Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Known bilateral pulmonary nodules are not identified . Extremely low lung volumes are seen . Bibasilar opacities are likely atelectasis . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities identified .
    OUTPUT:
    
Extremely low lung volumes without definite acute cardiopulmonary process .