Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Relatively low lung volumes are seen . Bibasilar opacities are likely secondary to atelectasis . There is no effusion or pneumothorax . Cardiomediastinal silhouette is stable . Atherosclerotic calcifications again seen in the thoracic aorta . Prior posterior right rib fractures are again noted as well as a lower thoracic compression deformity .
    OUTPUT:
    
No acute cardiopulmonary process .