Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Relatively low lung volumes are noted with streaky bibasilar opacities which are likely atelectasis . There is no confluent consolidation worrisome for pneumonia . There is no large effusion . The cardiomediastinal silhouette is within normal limits . Tortuosity of the descending thoracic aorta is again noted which is partially calcified . No acute osseous abnormalities .
    OUTPUT:
    
No definite acute cardiopulmonary process .