Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are again noted with bibasilar atelectasis . Superiorly , the lungs are clear . The cardiomediastinal silhouette is within normal limits . Atherosclerotic calcifications are noted at the aortic arch . There are degenerative changes at the shoulders .
    OUTPUT:
    
Low lung volumes without definite acute cardiopulmonary process .