Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lower lung volumes seen on the current exam with bibasilar atelectasis . The lungs are otherwise clear . There is no effusion or pneumothorax . Cardiomediastinal silhouette is within normal limits . Atherosclerotic calcifications are noted at the aortic arch . Thoracolumbar S - shaped scoliosis is noted .
    OUTPUT:
    
No acute cardiopulmonary process .