Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest are compared to previous exam from ___ . Again low lung volumes are seen . Bibasilar opacities , left greater than right air likely due to secondary atelectasis . Cardiomediastinal silhouette is within normal limits for technique and unchanged . Osseous and soft tissue structures are unremarkable . Surgical clips in the right upper quadrant suggest prior cholecystectomy .
    OUTPUT:
    
Low lung volumes without definite acute cardiopulmonary process .