Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest . Streaky bibasilar opacities seen only on the frontal view are most likely due to atelectasis . The cardiomediastinal silhouette is within normal limits . Degenerative changes seen in the spine . Old healed bilateral rib fractures are noted .
    OUTPUT:
    
No acute cardiopulmonary process .